--- autotools.cygclass.bk	2018-02-13 09:49:21.751427000 +0100
+++ autotools.cygclass	2018-02-13 10:02:36.667625900 +0100
@@ -547,7 +547,7 @@
 			fi
 
 			auxdir="$(grep '^[^\#]*AC_CONFIG_AUX_DIR' ${sub_configure_ac} | sed -e 's!.*AC_CONFIG_AUX_DIR(\[*\(.*\))!\1!g' -e 's!\]*!!g')"
-			config_h="$(grep 'A[CM]_CONFIG_HEADERS*' ${sub_configure_ac} | sed -e 's!A[CM]_CONFIG_HEADERS*(\[*\(.*\))!\1!g' -e 's!\]*!!g')";
+			config_h="$(grep 'A[CM]_CONFIG_HEADERS*' ${sub_configure_ac} | sed -e 's!A[CM]_CONFIG_HEADERS*(\[*\([^],]*\).*)!\1!g')";
 
 			if defined config_h
 			then