diff --git a/av1/common/convolve.h b/av1/common/convolve.h
index 4109dd8..d0972db 100644
--- a/av1/common/convolve.h
+++ b/av1/common/convolve.h
@@ -118,6 +118,11 @@
                                    const struct scale_factors *sf,
                                    int is_intrabc, int bd);
 
+// TODO(sarahparker) This will need to be integerized and optimized
+void av1_convolve_2d_sobel_y_c(const uint8_t *src, int src_stride, double *dst,
+                               int dst_stride, int w, int h, int dir,
+                               double norm);
+
 #ifdef __cplusplus
 }  // extern "C"
 #endif