diff --git a/release/files_common b/release/files_common
index 4cc8b58d23..a835fa06d2 100644
--- a/release/files_common
+++ b/release/files_common
@@ -374,7 +374,7 @@ selfdrive/camerad/cameras/camera_qcom.h
 selfdrive/camerad/cameras/debayer.cl
 selfdrive/camerad/cameras/sensor_i2c.h
 
-selfdrive/camerad/transforms/rgb_to_yuv.c
+selfdrive/camerad/transforms/rgb_to_yuv.cc
 selfdrive/camerad/transforms/rgb_to_yuv.h
 selfdrive/camerad/transforms/rgb_to_yuv.cl
 selfdrive/camerad/transforms/rgb_to_yuv_test.cc
diff --git a/selfdrive/camerad/SConscript b/selfdrive/camerad/SConscript
index 2d2716a870..feb55a59e8 100644
--- a/selfdrive/camerad/SConscript
+++ b/selfdrive/camerad/SConscript
@@ -34,7 +34,7 @@ env.SharedLibrary('snapshot/visionipc',
 env.Program('camerad', [
     'main.cc',
     'cameras/camera_common.cc',
-    'transforms/rgb_to_yuv.c',
+    'transforms/rgb_to_yuv.cc',
     'imgproc/utils.cc',
     cameras,
   ], LIBS=libs)
diff --git a/selfdrive/camerad/transforms/rgb_to_yuv.c b/selfdrive/camerad/transforms/rgb_to_yuv.cc
similarity index 100%
rename from selfdrive/camerad/transforms/rgb_to_yuv.c
rename to selfdrive/camerad/transforms/rgb_to_yuv.cc
diff --git a/selfdrive/camerad/transforms/rgb_to_yuv.h b/selfdrive/camerad/transforms/rgb_to_yuv.h
index 7989580345..05d5c5ece4 100644
--- a/selfdrive/camerad/transforms/rgb_to_yuv.h
+++ b/selfdrive/camerad/transforms/rgb_to_yuv.h
@@ -1,5 +1,4 @@
-#ifndef RGB_TO_YUV_H
-#define RGB_TO_YUV_H
+#pragma once
 
 #include <inttypes.h>
 #include <stdbool.h>
@@ -10,10 +9,6 @@
 #include <CL/cl.h>
 #endif
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 typedef struct {
   int width, height;
   cl_kernel rgb_to_yuv_krnl;
@@ -24,9 +19,3 @@ void rgb_to_yuv_init(RGBToYUVState* s, cl_context ctx, cl_device_id device_id, i
 void rgb_to_yuv_destroy(RGBToYUVState* s);
 
 void rgb_to_yuv_queue(RGBToYUVState* s, cl_command_queue q, cl_mem rgb_cl, cl_mem yuv_cl);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif  // RGB_TO_YUV_H