diff --git a/js/src/jscntxt.c b/js/src/jscntxt.c
index 139ad9b8..257197ae 100644
--- a/js/src/jscntxt.c
+++ b/js/src/jscntxt.c
@@ -1220,7 +1220,7 @@ JSErrorFormatString js_ErrorFormatString[JSErr_Limit] = {
 #undef MSG_DEF
 };
 
-const JSErrorFormatString *
+JS_PUBLIC_API(const JSErrorFormatString *)
 js_GetErrorMessage(void *userRef, const char *locale, const uintN errorNumber)
 {
     if ((errorNumber > 0) && (errorNumber < JSErr_Limit))