diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index a577889e9..d42a795fe 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -19,6 +19,7 @@ set(ncnn_SRCS
     mat.cpp
     mat_pixel.cpp
     mat_pixel_resize.cpp
+    mat_pixel_rotate.cpp
     modelbin.cpp
     net.cpp
     opencv.cpp