diff --git a/src/lapi.c b/src/lapi.c
index f55874a..8bb20e7 100644
--- a/src/lapi.c
+++ b/src/lapi.c
@@ -1630,7 +1630,7 @@ LUA_API const char *lua_setupvalue (lua_State *L, int funcindex, int n) {
     */
   
     StkId input = L->top - 1;
-    int compatible = ravi_checktype(L, input, type, usertype);
+    int compatible = raviV_checktype(L, input, type, usertype);
           
     if (!compatible)
       name = NULL;
diff --git a/src/lcode.c b/src/lcode.c
index 0a7f406..be67d56 100644
--- a/src/lcode.c
+++ b/src/lcode.c
@@ -920,7 +920,7 @@ static void check_valid_store(FuncState *fs, expdesc *var, expdesc *ex) {
       fs->ls,
       luaO_pushfstring(
       fs->ls->L,
-      "Invalid assignment: string expected"));      
+      "Invalid assignment: string expected"));
   }
   else if (var->ravi_type_map == (RAVI_TM_FUNCTION | RAVI_TM_NIL)) {
     if ((ex_ravi_type_map & ~(RAVI_TM_FUNCTION | RAVI_TM_NIL)) == 0)
@@ -929,7 +929,7 @@ static void check_valid_store(FuncState *fs, expdesc *var, expdesc *ex) {
       fs->ls,
       luaO_pushfstring(
       fs->ls->L,
-      "Invalid assignment: function expected"));      
+      "Invalid assignment: function expected"));
   }
   else if (var->ravi_type_map == (RAVI_TM_USERDATA | RAVI_TM_NIL)) {
     if ((ex_ravi_type_map & ~(RAVI_TM_USERDATA | RAVI_TM_NIL)) == 0 &&
@@ -939,8 +939,8 @@ static void check_valid_store(FuncState *fs, expdesc *var, expdesc *ex) {
       fs->ls,
       luaO_pushfstring(
       fs->ls->L,
-      "Invalid assignment: usertype %s expected", (var->usertype ? getstr(var->usertype) : "UNKNOWN")));      
-  }  
+      "Invalid assignment: usertype %s expected", (var->usertype ? getstr(var->usertype) : "UNKNOWN")));
+  }
 }
 
 static OpCode check_valid_setupval(FuncState *fs, expdesc *var, expdesc *ex,
diff --git a/src/lparser.c b/src/lparser.c
index 0968490..3b6695c 100644
--- a/src/lparser.c
+++ b/src/lparser.c
@@ -1223,30 +1223,30 @@ static void constructor (LexState *ls, expdesc *t) {
  * be anchored somewhere else by the time parsing finishes
  */
 static TString *user_defined_type_name(LexState *ls, TString *typename) {
-	size_t len = 0;
-	if (testnext(ls, '.')) {
-		char buffer[128] = { 0 };
-		const char *str = getstr(typename);
-		len = strlen(str);
-		if (len >= sizeof buffer) {
-			luaX_syntaxerror(ls, "User defined type name is too long");
-			return typename;
-		}
-		snprintf(buffer, sizeof buffer, "%s", str);
-		do {
-			typename = str_checkname(ls);
-			str = getstr(typename);
-			size_t newlen = len + strlen(str) + 1;
-			if (newlen >= sizeof buffer) {
-				luaX_syntaxerror(ls, "User defined type name is too long");
-				return typename;
-			}
-			snprintf(buffer + len, sizeof buffer - len, ".%s", str);
-			len = newlen;
-		} while (testnext(ls, '.'));
-		typename = luaX_newstring(ls, buffer, strlen(buffer));
-	}
-	return typename;
+  size_t len = 0;
+  if (testnext(ls, '.')) {
+    char buffer[128] = {0};
+    const char *str = getstr(typename);
+    len = strlen(str);
+    if (len >= sizeof buffer) {
+      luaX_syntaxerror(ls, "User defined type name is too long");
+      return typename;
+    }
+    snprintf(buffer, sizeof buffer, "%s", str);
+    do {
+      typename = str_checkname(ls);
+      str = getstr(typename);
+      size_t newlen = len + strlen(str) + 1;
+      if (newlen >= sizeof buffer) {
+        luaX_syntaxerror(ls, "User defined type name is too long");
+        return typename;
+      }
+      snprintf(buffer + len, sizeof buffer - len, ".%s", str);
+      len = newlen;
+    } while (testnext(ls, '.'));
+    typename = luaX_newstring(ls, buffer, strlen(buffer));
+  }
+  return typename;
 }
 
 /* RAVI Parse
@@ -1279,8 +1279,8 @@ static ravi_type_map declare_localvar(LexState *ls, TString **pusertype) {
       tm = RAVI_TM_TABLE;
     else if (strcmp(str, "string") == 0)
       tm = RAVI_TM_STRING | RAVI_TM_NIL;
-    else if (strcmp(str, "boolean") == 0)
-      tm = RAVI_TM_BOOLEAN | RAVI_TM_NIL;
+    //else if (strcmp(str, "boolean") == 0)
+    //  tm = RAVI_TM_BOOLEAN | RAVI_TM_NIL;
     else if (strcmp(str, "any") == 0)
       tm = RAVI_TM_ANY;
     else {
diff --git a/src/lvm.c b/src/lvm.c
index eb96425..a95ecfc 100644
--- a/src/lvm.c
+++ b/src/lvm.c
@@ -1204,6 +1204,33 @@ void luaV_finishOp (lua_State *L) {
   if (!luaV_fastset(L,t,k,slot,luaH_get,v)) \
     Protect(luaV_finishset(L,t,k,v,slot)); }
 
+int raviV_checktype(lua_State *L, TValue *input, ravitype_t type, TString *usertype) {
+  if (type == RAVI_TANY)
+    return 1;
+  if (type == RAVI_TNIL && ttisnil(input))
+    return 1;
+  if (type == RAVI_TBOOLEAN && ttisboolean(input))
+    return 1;
+  if (type == RAVI_TNUMINT && ttisinteger(input))
+    return 1;
+  if (type == RAVI_TNUMFLT && ttisfloat(input))
+    return 1;
+  if (type == RAVI_TARRAYINT && ttisiarray(input))
+    return 1;
+  if (type == RAVI_TARRAYFLT && ttisfarray(input))
+    return 1;
+  if (type == RAVI_TTABLE && ttisLtable(input))
+    return 1;
+  if (type == RAVI_TSTRING && ttisstring(input))
+    return 1;
+  if (type == RAVI_TFUNCTION && ttisclosure(input))
+    return 1;
+  if (type == RAVI_TUSERDATA) {
+    if (raviV_check_usertype(L, usertype, input))
+      return 1;
+  }
+  return 0;
+}
 
 int raviV_check_usertype(lua_State *L, TString *name, const TValue *o)
 {
diff --git a/src/lvm.h b/src/lvm.h
index bf2bf6c..111211e 100644
--- a/src/lvm.h
+++ b/src/lvm.h
@@ -172,6 +172,7 @@ LUAI_FUNC void raviV_settable_sskey(lua_State *L, const TValue *t, TValue *key,
 LUAI_FUNC void raviV_gettable_i(lua_State *L, const TValue *t, TValue *key, StkId val);
 LUAI_FUNC void raviV_settable_i(lua_State *L, const TValue *t, TValue *key, StkId val);
 LUAI_FUNC void raviV_op_totype(lua_State *L, TValue *ra, TValue *rb);
+LUAI_FUNC int raviV_checktype(lua_State *L, TValue *input, ravitype_t type, TString *usertype);
 LUAI_FUNC int raviV_check_usertype(lua_State *L, TString *name, const TValue *o);
 #ifdef RAVI_DEFER_STATEMENT
 LUAI_FUNC void raviV_op_defer(lua_State *L, TValue *ra);
diff --git a/tests/comptests/inputs/25_bits.lua b/tests/comptests/inputs/25_bits.lua
index 722a926..bdd7f9a 100644
--- a/tests/comptests/inputs/25_bits.lua
+++ b/tests/comptests/inputs/25_bits.lua
@@ -1,5 +1,5 @@
 f = compiler.load([[
-function doit(a, 25_bits.luawhat)
+function doit(a, what)
     local f: integer = ~0
     if what == '&' then
         return a&f
@@ -25,4 +25,4 @@ assert(math.abs(doit(16, '|') - ~0) < 1e-15)
 assert(math.abs(doit(16, '<<') - 32) < 1e-15)
 assert(math.abs(doit(16, '>>') - 8) < 1e-15)
 assert(math.abs(doit(16, '~') - ~16) < 1e-15)
-print 'Ok'
\ No newline at end of file
+print 'Ok'
diff --git a/tests/language/ravi_tests1.ravi b/tests/language/ravi_tests1.ravi
index d27cc2a..9767d0a 100644
--- a/tests/language/ravi_tests1.ravi
+++ b/tests/language/ravi_tests1.ravi
@@ -1842,6 +1842,42 @@ do
 end
 print 'Test 87 OK'
 
+do
+ local function doit(a: integer, what)
+    local f: integer = ~0
+    if what == '&' then
+        return a&f
+    elseif what == '|' then
+        return a|f
+    elseif what == '<<' then
+        return a<<1
+    elseif what == '>>' then
+        return a>>1
+    elseif what == '~' then
+        return ~a
+    else
+        return 0
+    end
+ end
+ check(doit, 'TOINT', 'LOADK', 'EQ', 'JMP', 'BAND_II',
+   'RETURN', 'JMP', 'EQ', 'JMP', 'BOR_II', 'RETURN', 
+   'JMP', 'EQ', 'JMP', 'SHL_II', 'RETURN', 'JMP', 'EQ',
+   'JMP', 'SHR_II', 'RETURN', 'JMP', 'EQ', 'JMP', 
+   'BNOT_I', 'RETURN', 'JMP', 'LOADK', 'RETURN', 'RETURN') 
+ assert(doit and type(doit) == 'function')
+ assert(math.abs(doit(16, '&') - 16) < 1e-15)
+ assert(math.abs(doit(16, '|') - ~0) < 1e-15)
+ assert(math.abs(doit(16, '<<') - 32) < 1e-15)
+ assert(math.abs(doit(16, '>>') - 8) < 1e-15)
+ assert(math.abs(doit(16, '~') - ~16) < 1e-15)
+ compile(doit)
+ assert(math.abs(doit(16, '&') - 16) < 1e-15)
+ assert(math.abs(doit(16, '|') - ~0) < 1e-15)
+ assert(math.abs(doit(16, '<<') - 32) < 1e-15)
+ assert(math.abs(doit(16, '>>') - 8) < 1e-15)
+ assert(math.abs(doit(16, '~') - ~16) < 1e-15)
+end
+print 'Test 88 OK'
 
 for k,v in pairs(opcodes_coverage)
 do