diff --git a/src/Parser.c b/src/Parser.c
index 146f2c8..886ebf1 100644
--- a/src/Parser.c
+++ b/src/Parser.c
@@ -312,7 +312,7 @@ struct ASTNode* CallFunction() {
     int FuncID;
 
     //TODO: Test structural type!
-    if((FuncID == FindSymbol(CurrentIdentifier)) == -1 && (Symbols[FuncID].Structure == ST_FUNC))
+    if((FuncID = FindSymbol(CurrentIdentifier)) == -1 && (Symbols[FuncID].Structure == ST_FUNC))
         DieMessage("Undeclared function", CurrentIdentifier);
 
     VerifyToken(LI_LPARE, "(");