diff --git a/av1/common/convolve.h b/av1/common/convolve.h
index 19712fd..471152e 100644
--- a/av1/common/convolve.h
+++ b/av1/common/convolve.h
@@ -42,7 +42,8 @@
   conv_params.plane = plane;
   return conv_params;
 }
-
+struct AV1Common;
+void av1_convolve_init(struct AV1Common *cm);
 #if CONFIG_CONVOLVE_ROUND
 void av1_convolve_2d(const uint8_t *src, int src_stride, CONV_BUF_TYPE *dst,
                      int dst_stride, int w, int h,