diff --git a/etc/config.sh/aliases b/etc/config.sh/aliases
index 6079901..d5475f9 100644
--- a/etc/config.sh/aliases
+++ b/etc/config.sh/aliases
@@ -70,7 +70,9 @@ alias run='cd $FOAM_RUN'
 # Refresh the environment
 # ~~~~~~~~~~~~~~~~~~~~~~~
 # For backward-compatibility unalias wmRefresh if it is defined as an alias
-[ "$(type -t wmRefresh)" = "alias" ] && unalias wmRefresh || unset wmRefresh
+type wmRefresh 2>/dev/null | grep -q " alias" && \
+    unalias wmRefresh || unset wmRefresh
+
 wmRefresh()
 {
     wmProjectDir=$WM_PROJECT_DIR