diff --git a/cpp/ql/src/Critical/OverflowDestination.cpp b/cpp/ql/src/Critical/OverflowDestination.cpp
index 1a758430bf4..02c5281d0b6 100644
--- a/cpp/ql/src/Critical/OverflowDestination.cpp
+++ b/cpp/ql/src/Critical/OverflowDestination.cpp
@@ -1,13 +1,13 @@
 
 int main(int argc, char* argv[]) {
-	char param[SIZE];
+	char param[20];
+	char *arg1;
 
-	char arg1[10];
-	char arg2[20];
+	arg1 = argv[1];
 
 	//wrong: only uses the size of the source (argv[1]) when using strncpy
-	strncpy(param, argv[1], strlen(arg1));
+	strncpy(param, arg1, strlen(arg1));
 
 	//correct: uses the size of the destination array as well
-	strncpy(param, argv[1], min(strlen(arg1, sizeof(param) -1)));
+	strncpy(param, arg1, min(strlen(arg1), sizeof(param) -1));
 }