diff --git a/apache2/msc_lua.c b/apache2/msc_lua.c
index b83b8001..0346fff1 100644
--- a/apache2/msc_lua.c
+++ b/apache2/msc_lua.c
@@ -123,7 +123,7 @@ static int l_log(lua_State *L) {
 
     /* Log message. */
     if (msr != NULL) {
-        msr_log(msr, level, text);
+        msr_log(msr, level, "%s", text);
     }
 
     return 0;