diff --git a/project/config/cfgdefs.sh b/project/config/cfgdefs.sh
index e616905..ce35a70 100644
--- a/project/config/cfgdefs.sh
+++ b/project/config/cfgdefs.sh
@@ -106,6 +106,7 @@ cfgdefs_output_custom_defs()
 			-e 's/@python_micro@/'"$python_micro"'/g'   \
 			-e 's/@python_abifl@/'"$python_abifl"'/g'   \
 		"$mb_project_dir/project/config/cfgdefs.in"         \
+	| sed -e 's/[ \t]*$//g'                                     \
 			>> "$mb_pwd/cfgdefs.mk"
 }