diff --git a/rif.h b/rif.h
index 8999986..27f2ccd 100644
--- a/rif.h
+++ b/rif.h
@@ -23,4 +23,5 @@ void write_rif_little(char* path, uint32_t width, uint32_t size, uint8_t format,
   memcpy(((char*)img)+17, data, size);
   FILE* output_file = fopen(path, "w");
   fwrite(img, 1, IMG_SIZE, output_file);
+  free(img);
 }