diff --git a/gsk/gpu/gskgpublitop.c b/gsk/gpu/gskgpublitop.c
index b2baf07422..f45f7c3a98 100644
--- a/gsk/gpu/gskgpublitop.c
+++ b/gsk/gpu/gskgpublitop.c
@@ -85,7 +85,6 @@ gsk_gpu_blit_op_vk_command (GskGpuOp              *op,
     {
       default:
         g_assert_not_reached ();
-        G_GNUC_FALLTHROUGH;
       case GSK_GPU_BLIT_LINEAR:
         filter = VK_FILTER_LINEAR;
         break;
@@ -160,7 +159,6 @@ gsk_gpu_blit_op_gl_command (GskGpuOp          *op,
     {
       default:
         g_assert_not_reached ();
-        G_GNUC_FALLTHROUGH;
       case GSK_GPU_BLIT_LINEAR:
         filter = GL_LINEAR;
         break;
diff --git a/gsk/gpu/gskgpunodeprocessor.c b/gsk/gpu/gskgpunodeprocessor.c
index ac2ab41c89..70af8a2d20 100644
--- a/gsk/gpu/gskgpunodeprocessor.c
+++ b/gsk/gpu/gskgpunodeprocessor.c
@@ -563,7 +563,6 @@ extract_scale_from_transform (GskTransform *transform,
     {
     default:
       g_assert_not_reached ();
-      G_GNUC_FALLTHROUGH;
     case GSK_TRANSFORM_CATEGORY_IDENTITY:
     case GSK_TRANSFORM_CATEGORY_2D_TRANSLATE:
       *out_scale_x = 1.0f;
diff --git a/gsk/gpu/gskgpurenderpassop.c b/gsk/gpu/gskgpurenderpassop.c
index 4ed10584d2..c9f7ee2615 100644
--- a/gsk/gpu/gskgpurenderpassop.c
+++ b/gsk/gpu/gskgpurenderpassop.c
@@ -54,7 +54,6 @@ gsk_gpu_render_pass_type_to_vk_image_layout (GskRenderPassType type)
   {
     default:
       g_assert_not_reached ();
-      G_GNUC_FALLTHROUGH;
     case GSK_RENDER_PASS_PRESENT:
       return VK_IMAGE_LAYOUT_PRESENT_SRC_KHR;
     case GSK_RENDER_PASS_OFFSCREEN: