diff --git a/reactos/cmake/gcc.cmake b/reactos/cmake/gcc.cmake
index 31d71b28c9e..5db74d93ffd 100644
--- a/reactos/cmake/gcc.cmake
+++ b/reactos/cmake/gcc.cmake
@@ -243,8 +243,7 @@ function(spec2def _dllname _spec_file)
         OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${_file}.def ${CMAKE_CURRENT_BINARY_DIR}/${_file}_stubs.c
         COMMAND native-spec2def -n=${_dllname} --kill-at -a=${ARCH2} -d=${CMAKE_CURRENT_BINARY_DIR}/${_file}.def -s=${CMAKE_CURRENT_BINARY_DIR}/${_file}_stubs.c ${CMAKE_CURRENT_SOURCE_DIR}/${_spec_file}
         DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/${_spec_file} native-spec2def)
-    set_source_files_properties(${CMAKE_CURRENT_BINARY_DIR}/${_file}.def PROPERTIES EXTERNAL_OBJECT TRUE)
-    
+
     if(__add_importlib)
         # generate the def for the export lib
         add_custom_command(
@@ -252,7 +251,7 @@ function(spec2def _dllname _spec_file)
             COMMAND native-spec2def -n=${_dllname} -a=${ARCH2} -d=${CMAKE_CURRENT_BINARY_DIR}/${_file}_implib.def ${CMAKE_CURRENT_SOURCE_DIR}/${_spec_file}
             DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/${_spec_file} native-spec2def)
         set_source_files_properties(${CMAKE_CURRENT_BINARY_DIR}/${_file}_implib.def PROPERTIES EXTERNAL_OBJECT TRUE)
-        
+
         #create normal importlib
         _add_library(lib${_file} STATIC EXCLUDE_FROM_ALL ${CMAKE_CURRENT_BINARY_DIR}/${_file}_implib.def)
         set_target_properties(lib${_file} PROPERTIES LINKER_LANGUAGE "IMPLIB" PREFIX "")