diff --git a/gsk/gskdebug.c b/gsk/gskdebug.c
index 216e118441..bf82b892c8 100644
--- a/gsk/gskdebug.c
+++ b/gsk/gskdebug.c
@@ -8,7 +8,8 @@ static const GDebugKey gsk_debug_keys[] = {
   { "opengl", GSK_DEBUG_OPENGL },
   { "shaders", GSK_DEBUG_SHADERS },
   { "transforms", GSK_DEBUG_TRANSFORMS },
-  { "surface", GSK_DEBUG_SURFACE }
+  { "surface", GSK_DEBUG_SURFACE },
+  { "vulkan", GSK_DEBUG_VULKAN }
 };
 #endif
 
diff --git a/gsk/gskdebugprivate.h b/gsk/gskdebugprivate.h
index ee1857c97b..29e529beed 100644
--- a/gsk/gskdebugprivate.h
+++ b/gsk/gskdebugprivate.h
@@ -12,7 +12,8 @@ typedef enum {
   GSK_DEBUG_OPENGL      = 1 << 3,
   GSK_DEBUG_SHADERS     = 1 << 4,
   GSK_DEBUG_TRANSFORMS  = 1 << 5,
-  GSK_DEBUG_SURFACE     = 1 << 6
+  GSK_DEBUG_SURFACE     = 1 << 6,
+  GSK_DEBUG_VULKAN      = 1 << 7
 } GskDebugFlags;
 
 typedef enum {