diff --git a/src/gtksourceiter.h b/src/gtksourceiter.h
index f2a4235..5bc1d56 100644
--- a/src/gtksourceiter.h
+++ b/src/gtksourceiter.h
@@ -28,9 +28,9 @@ G_BEGIN_DECLS
 
 typedef enum
 {
-	GTK_SOURCE_SEARCH_VISIBLE_ONLY,
-	GTK_SOURCE_SEARCH_TEXT_ONLY,
-	GTK_SOURCE_SEARCH_CASE_INSENSITIVE
+	GTK_SOURCE_SEARCH_VISIBLE_ONLY = 1,
+	GTK_SOURCE_SEARCH_TEXT_ONLY = 2,
+	GTK_SOURCE_SEARCH_CASE_INSENSITIVE = 4
 	/* Possible future plans: SEARCH_REGEXP */
 } GtkSourceSearchFlags;