diff --git a/configure.ac b/configure.ac
index 40e8a95f57..ca9c41a383 100644
--- a/configure.ac
+++ b/configure.ac
@@ -255,8 +255,8 @@ AC_SUBST(CSRCFLAG)
 : ${MJIT_CC=$CC}
 AS_IF([test "x$cross_compiling" = xno], [
     AC_PATH_PROG([MJIT_CC], ${MJIT_CC-$CC})
-    AS_CASE([$build_os:$host_os],
-	[*cygwin*:*mingw*], [MJIT_CC=`cygpath -ma $MJIT_CC`])
+    AS_CASE([$target_os],
+	[*mingw*], [command -v cygpath && MJIT_CC=`cygpath -ma $MJIT_CC`])
     shift 2
     MJIT_CC="$MJIT_CC${1+ }$*"
 ])