diff --git a/Sources/CoreFoundation/internalInclude/CoreFoundation_Prefix.h b/Sources/CoreFoundation/internalInclude/CoreFoundation_Prefix.h
index 8d5a2460cf..2c41d2861f 100644
--- a/Sources/CoreFoundation/internalInclude/CoreFoundation_Prefix.h
+++ b/Sources/CoreFoundation/internalInclude/CoreFoundation_Prefix.h
@@ -58,6 +58,7 @@
 #define TARGET_OS_WATCH 0
 #endif
 
+#include "CFBase.h"
 
 #include <stdlib.h>
 #include <stdint.h>