diff --git a/src/misc.c b/src/misc.c
index c1c91d308..2e2837050 100644
--- a/src/misc.c
+++ b/src/misc.c
@@ -2676,7 +2676,7 @@ uint64_t HAMLIB_API rig_get_caps_int(rig_model_t rig_model,
         return caps->port_type;
 
     case RIG_CAPS_HAS_GET_LEVEL:
-        rig_debug(RIG_DEBUG_TRACE, "%s(%d): return %8lx\n", __func__, __LINE__, caps->has_get_level);
+        rig_debug(RIG_DEBUG_TRACE, "%s(%d): return %08"PRIll"\n", __func__, __LINE__, caps->has_get_level);
         return caps->has_get_level;
 
     default: