diff --git a/src/libsysprof/sysprof-callgraph.h b/src/libsysprof/sysprof-callgraph.h
index f309014b..295219fb 100644
--- a/src/libsysprof/sysprof-callgraph.h
+++ b/src/libsysprof/sysprof-callgraph.h
@@ -76,6 +76,7 @@ typedef enum _SysprofCallgraphCategory
   SYSPROF_CALLGRAPH_CATEGORY_IPC,
   SYSPROF_CALLGRAPH_CATEGORY_KERNEL,
   SYSPROF_CALLGRAPH_CATEGORY_LAYOUT,
+  SYSPROF_CALLGRAPH_CATEGORY_LOCKING,
   SYSPROF_CALLGRAPH_CATEGORY_MAIN_LOOP,
   SYSPROF_CALLGRAPH_CATEGORY_PAINT,
   SYSPROF_CALLGRAPH_CATEGORY_UNWINDABLE,
diff --git a/src/libsysprof/sysprof-category-summary.c b/src/libsysprof/sysprof-category-summary.c
index 0651c35b..f9f48fca 100644
--- a/src/libsysprof/sysprof-category-summary.c
+++ b/src/libsysprof/sysprof-category-summary.c
@@ -167,6 +167,9 @@ sysprof_category_summary_get_category_name (SysprofCategorySummary *self)
     case SYSPROF_CALLGRAPH_CATEGORY_LAYOUT:
       return _("Layout");
 
+    case SYSPROF_CALLGRAPH_CATEGORY_LOCKING:
+      return _("Locking");
+
     case SYSPROF_CALLGRAPH_CATEGORY_MAIN_LOOP:
       return _("Main Loop");
 
diff --git a/src/sysprof/sysprof-category-icon.c b/src/sysprof/sysprof-category-icon.c
index 778582d6..5c724742 100644
--- a/src/sysprof/sysprof-category-icon.c
+++ b/src/sysprof/sysprof-category-icon.c
@@ -126,6 +126,7 @@ sysprof_category_icon_class_init (SysprofCategoryIconClass *klass)
   gdk_rgba_parse (&category_colors[SYSPROF_CALLGRAPH_CATEGORY_INPUT], "#1a5fb4");
   gdk_rgba_parse (&category_colors[SYSPROF_CALLGRAPH_CATEGORY_KERNEL], "#a51d2d");
   gdk_rgba_parse (&category_colors[SYSPROF_CALLGRAPH_CATEGORY_LAYOUT], "#9141ac");
+  gdk_rgba_parse (&category_colors[SYSPROF_CALLGRAPH_CATEGORY_LOCKING], "#f5c211");
   gdk_rgba_parse (&category_colors[SYSPROF_CALLGRAPH_CATEGORY_MAIN_LOOP], "#5e5c64");
   gdk_rgba_parse (&category_colors[SYSPROF_CALLGRAPH_CATEGORY_PAINT], "#2ec27e");
   gdk_rgba_parse (&category_colors[SYSPROF_CALLGRAPH_CATEGORY_IO], "#cdab8f");