diff --git a/source/blender/blenkernel/intern/screen.c b/source/blender/blenkernel/intern/screen.c
index 5c81b3e238a..cd8493ee559 100644
--- a/source/blender/blenkernel/intern/screen.c
+++ b/source/blender/blenkernel/intern/screen.c
@@ -45,6 +45,7 @@
 #include "DNA_view3d_types.h"
 #include "DNA_workspace_types.h"
 
+#include "BLI_ghash.h"
 #include "BLI_listbase.h"
 #include "BLI_math_vector.h"
 #include "BLI_mempool.h"
@@ -671,6 +672,11 @@ void BKE_area_region_free(SpaceType *st, ARegion *region)
     region_free_gizmomap_callback(region->gizmo_map);
   }
 
+  if (region->runtime.block_name_map != NULL) {
+    BLI_ghash_free(region->runtime.block_name_map, NULL, NULL);
+    region->runtime.block_name_map = NULL;
+  }
+
   BLI_freelistN(&region->ui_lists);
   BLI_freelistN(&region->ui_previews);
   BLI_freelistN(&region->panels_category);