diff --git a/game/utils/string_frm.h b/game/utils/string_frm.h
index 8c8466c2b..20139bc0c 100644
--- a/game/utils/string_frm.h
+++ b/game/utils/string_frm.h
@@ -137,7 +137,7 @@ class alignas(64) string_frm {
 
     void implWrite(char* out, size_t maxSz, size_t& at, size_t arg) {
       char buf[20] = {};
-      std::snprintf(buf,sizeof(buf),"%llu",uint64_t(arg));
+      std::snprintf(buf,sizeof(buf),"%lu",uint64_t(arg));
       implWrite(out, maxSz, at, buf);
       }