--- a/libavcodec/i386/vp3dsp_sse2.h
+++ b/libavcodec/i386/vp3dsp_sse2.h
@@ -19,8 +19,8 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#ifndef VP3DSP_SSE2_H
-#define VP3DSP_SSE2_H
+#ifndef FFMPEG_VP3DSP_SSE2_H
+#define FFMPEG_VP3DSP_SSE2_H
 
 #include "dsputil.h"
 
@@ -28,4 +28,4 @@
 void ff_vp3_idct_put_sse2(uint8_t *dest, int line_size, DCTELEM *block);
 void ff_vp3_idct_add_sse2(uint8_t *dest, int line_size, DCTELEM *block);
 
-#endif /* VP3DSP_SSE2_H */
+#endif /* FFMPEG_VP3DSP_SSE2_H */