diff --git a/include/image/filters.h b/include/image/filters.h
index 59fe881..0229609 100644
--- a/include/image/filters.h
+++ b/include/image/filters.h
@@ -146,6 +146,6 @@ u32_avg_gb(const unsigned int clr);
  * @return unsigned int Pointer to new created image buffer.
  */
 unsigned int*
-box_blur(const unsigned int* src_buf, const PPM* img, const int radius);
+u32_box_blur(const unsigned int* src_buf, const PPM* img, const int radius);
 
 #endif
diff --git a/src/filters.c b/src/filters.c
index 8cb8734..48e379b 100644
--- a/src/filters.c
+++ b/src/filters.c
@@ -255,7 +255,7 @@ blur_row(const unsigned int* src, const int x, const int y, const PPM* img,
 }
 
 unsigned int*
-box_blur(const unsigned int* src_buf, const PPM* img, const int radius)
+u32_box_blur(const unsigned int* src_buf, const PPM* img, const int radius)
 {
 	unsigned int* first_pass = malloc(img->len * sizeof(unsigned int));
 	if (!first_pass)