diff --git a/internal/c/common.cpp b/internal/c/common.cpp
index 72e44547c..c5a663584 100644
--- a/internal/c/common.cpp
+++ b/internal/c/common.cpp
@@ -95,7 +95,7 @@
 #include <time.h>
 #include <string.h>
 #include <errno.h>
-
+#include <fcntl.h>
 
 //OS/compiler specific includes
 #ifdef QB64_WINDOWS