diff --git a/src/compiler/ParseHelper.cpp b/src/compiler/ParseHelper.cpp
index 430ba53..53f3fa8 100644
--- a/src/compiler/ParseHelper.cpp
+++ b/src/compiler/ParseHelper.cpp
@@ -545,7 +545,7 @@
         return true;
     }
     
-    if (op == EOpConstructStruct && !type->isArray() && type->getStruct()->size() != function.getParamCount()) {
+    if (op == EOpConstructStruct && !type->isArray() && int(type->getStruct()->size()) != function.getParamCount()) {
         error(line, "Number of constructor parameters does not match the number of structure fields", "constructor", "");
         return true;
     }