diff --git a/singleheader/amalgamate.sh b/singleheader/amalgamate.sh
index 901cd146..a14f6a2b 100755
--- a/singleheader/amalgamate.sh
+++ b/singleheader/amalgamate.sh
@@ -132,6 +132,7 @@ cat <<< '
 int main(int argc, char *argv[]) {
   if(argc < 2) {
     std::cerr << "Please specify at least one file name. " << std::endl;
+    return EXIT_FAILURE;
   }
   const char * filename = argv[1];
   simdjson::dom::parser parser;
diff --git a/singleheader/amalgamate_demo.cpp b/singleheader/amalgamate_demo.cpp
index 2478fc8b..54cfc77a 100644
--- a/singleheader/amalgamate_demo.cpp
+++ b/singleheader/amalgamate_demo.cpp
@@ -6,6 +6,7 @@
 int main(int argc, char *argv[]) {
   if(argc < 2) {
     std::cerr << "Please specify at least one file name. " << std::endl;
+    return EXIT_FAILURE;
   }
   const char * filename = argv[1];
   simdjson::dom::parser parser;
@@ -42,4 +43,3 @@ int main(int argc, char *argv[]) {
   }
   return EXIT_SUCCESS;
 }
-