diff --git a/app/tools/gimpguidetool.c b/app/tools/gimpguidetool.c
index e8676d4bfa..38123c3ca2 100644
--- a/app/tools/gimpguidetool.c
+++ b/app/tools/gimpguidetool.c
@@ -427,7 +427,7 @@ gimp_guide_tool_push_status (GimpGuideTool *guide_tool,
     }
   else
     {
-      GimpGuideToolGuide *guides[2];
+      GimpGuideToolGuide *guides[2] = { 0, };
       gint                n_guides = 0;
       gint                i;