diff --git a/en/03_Drawing_a_triangle/02_Graphics_pipeline_basics/01_Shader_modules.adoc b/en/03_Drawing_a_triangle/02_Graphics_pipeline_basics/01_Shader_modules.adoc
index 595e3f8a..c26edb56 100644
--- a/en/03_Drawing_a_triangle/02_Graphics_pipeline_basics/01_Shader_modules.adoc
+++ b/en/03_Drawing_a_triangle/02_Graphics_pipeline_basics/01_Shader_modules.adoc
@@ -326,7 +326,7 @@ CMake function:
 [,cmake]
 ----
 function (add_slang_shader_target TARGET)
-  cmake_parse_arguments ("SHADER" "" "SOURCES" ${ARGN})
+  cmake_parse_arguments ("SHADER" "" "" "SOURCES" ${ARGN})
   set (SHADERS_DIR ${CMAKE_CURRENT_LIST_DIR}/shaders)
   set (ENTRY_POINTS -entry vertMain -entry fragMain)
   add_custom_command (