1 files changed, 4 insertions, 0 deletions
diff --git a/vm_opts.h b/vm_opts.h
index 02d60e71fd..b0ca81f304 100644
--- a/vm_opts.h
+++ b/vm_opts.h
@@ -62,6 +62,10 @@
 #define OPT_SUPPORT_JOKE             0
 #endif
 
+#ifndef OPT_SUPPORT_CALL_C_FUNCTION
+#define OPT_SUPPORT_CALL_C_FUNCTION  0
+#endif
+
 #ifndef VM_COLLECT_USAGE_DETAILS
 #define VM_COLLECT_USAGE_DETAILS     0
 #endif