diff --git a/src/mesa/main/fbobject.c b/src/mesa/main/fbobject.c
index d094dd35a69..84969360d92 100644
--- a/src/mesa/main/fbobject.c
+++ b/src/mesa/main/fbobject.c
@@ -2603,6 +2603,10 @@ _mesa_BlitFramebufferEXT(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
       }
    }
 
+   if (!mask) {
+      return;
+   }
+
    ASSERT(ctx->Driver.BlitFramebuffer);
    ctx->Driver.BlitFramebuffer(ctx,
                                srcX0, srcY0, srcX1, srcY1,