diff --git a/js/src/xpconnect/shell/xpcshell.cpp b/js/src/xpconnect/shell/xpcshell.cpp
index cb07c7ec2bb5..eb62100787c5 100644
--- a/js/src/xpconnect/shell/xpcshell.cpp
+++ b/js/src/xpconnect/shell/xpcshell.cpp
@@ -241,8 +241,8 @@ GetLocationProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
 
 #ifdef EDITLINE
 extern "C" {
-extern char     *readline(const char *prompt);
-extern void     add_history(char *line);
+extern JS_EXPORT_API(char)     *readline(const char *prompt);
+extern JS_EXPORT_API(void)     add_history(char *line);
 }
 #endif