diff --git a/epan/diam_dict.l b/epan/diam_dict.l
index 0b643599b4..5e9809ae1d 100644
--- a/epan/diam_dict.l
+++ b/epan/diam_dict.l
@@ -604,7 +604,7 @@ static FILE* ddict_open(const char* system_directory, const char* filename) {
 		fname = g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s",
 		    system_directory,filename);
 	} else {
-		fname = strdup(filename);
+		fname = g_strdup(filename);
 	}
 
 	fh = ws_fopen(fname,"r");