diff --git a/smem b/smem
index fa3275b..d4a0187 100755
--- a/smem
+++ b/smem
@@ -216,7 +216,7 @@ def showpids():
 
     def showuser(p):
         if options.numeric:
-            return piduser(p)
+            return src.piduser(p)
         return pidusername(p)
 
     fields = dict(