diff --git a/libs/vkd3d-shader/hlsl_sm4.c b/libs/vkd3d-shader/hlsl_sm4.c
index 9d45e163..f8eb0a1e 100644
--- a/libs/vkd3d-shader/hlsl_sm4.c
+++ b/libs/vkd3d-shader/hlsl_sm4.c
@@ -561,7 +561,7 @@ static void write_sm4_rdef(struct hlsl_ctx *ctx, struct dxbc_writer *dxbc)
             put_u32(&buffer, sm4_resource_format(var->data_type));
             put_u32(&buffer, sm4_rdef_resource_dimension(var->data_type));
             put_u32(&buffer, ~0u); /* FIXME: multisample count */
-            flags |= (var->data_type->e.resource_format->dimx - 1) << 2;
+            flags |= (var->data_type->e.resource_format->dimx - 1) << VKD3D_SM4_SIF_TEXTURE_COMPONENTS_SHIFT;
         }
         put_u32(&buffer, var->reg.id);
         put_u32(&buffer, 1); /* bind count */
diff --git a/libs/vkd3d-shader/sm4.h b/libs/vkd3d-shader/sm4.h
index ddcb9a86..f6b4b612 100644
--- a/libs/vkd3d-shader/sm4.h
+++ b/libs/vkd3d-shader/sm4.h
@@ -146,6 +146,9 @@
 
 #define VKD3D_SM4_TYPE_COMPONENT(com, i)      (((com) >> (4 * (i))) & 0xfu)
 
+/* The shift that corresponds to the D3D_SIF_TEXTURE_COMPONENTS mask. */
+#define VKD3D_SM4_SIF_TEXTURE_COMPONENTS_SHIFT 2
+
 enum vkd3d_sm4_opcode
 {
     VKD3D_SM4_OP_ADD                              = 0x00,