diff --git a/cmake/ncnn_generate_shader_comp_header.cmake b/cmake/ncnn_generate_shader_comp_header.cmake
index 79f7c1eff3be..6dcccbfdffb9 100644
--- a/cmake/ncnn_generate_shader_comp_header.cmake
+++ b/cmake/ncnn_generate_shader_comp_header.cmake
@@ -12,8 +12,14 @@ endif()
 # remove whitespace
 string(REGEX REPLACE "\n +" "\n" comp_data "${comp_data}")
 
+# remove comments
+string(REGEX REPLACE "//[^\n]*" "" comp_data "${comp_data}")
+
+# replace more spaces to one space
+string(REGEX REPLACE "[ \t]+" " " comp_data "${comp_data}")
+
 # remove empty line
-string(REGEX REPLACE "\n\n" "\n" comp_data "${comp_data}")
+string(REGEX REPLACE "\n[\n]+" "\n" comp_data "${comp_data}")
 
 get_filename_component(SHADER_SRC_NAME_WE ${SHADER_SRC} NAME_WE)