diff --git a/epan/dfilter/dfilter.c b/epan/dfilter/dfilter.c
index 21a4b51e2e..143693123d 100644
--- a/epan/dfilter/dfilter.c
+++ b/epan/dfilter/dfilter.c
@@ -223,7 +223,7 @@ dfilter_compile(const gchar *text, dfilter_t **dfp)
 
 	g_assert(dfp);
 
-	if (text == NULL) {
+	if (!text) {
 		*dfp = NULL;
 		return FALSE;
 	}