diff --git a/src/driver/framebuffer.cpp b/src/driver/framebuffer.cpp
index 4331ce20c..b890a43f4 100644
--- a/src/driver/framebuffer.cpp
+++ b/src/driver/framebuffer.cpp
@@ -730,6 +730,9 @@ fb_pixel_t* CFrameBuffer::paintBoxRel(const int x, const int y, const int dx, co
 #define MASK 0xFFFFFFFF
 
 	fb_pixel_t* boxBuf    = paintBoxRel2Buf(dx, dy, MASK, NULL, radius, type);
+        if (!boxBuf)
+               return NULL;
+
 	fb_pixel_t *bp        = boxBuf;
 	fb_pixel_t *gra       = gradientData->gradientBuf;
 	gradientData->boxBuf  = boxBuf;