diff --git a/src/symboltable.h b/src/symboltable.h
index 4eda84d..816f229 100644
--- a/src/symboltable.h
+++ b/src/symboltable.h
@@ -2,5 +2,8 @@
 
 #define _GNU_SOURCE 1
 
+#include "vmprof.h"
+
+RPY_EXTERN
 int vmp_resolve_addr(void * addr, char * name, int name_len, int * lineno,
                       char * srcfile, int srcfile_len);