diff --git a/configure.in b/configure.in
index 19c3f56fae..5f4fd0af8c 100644
--- a/configure.in
+++ b/configure.in
@@ -313,6 +313,8 @@ AC_MSG_RESULT([$ARCH_FLAG])
 
 AC_DEFUN([RUBY_UNIVERSAL_ARCH], [
 # RUBY_UNIVERSAL_ARCH begin
+ARCH_FLAG=`expr " $CXXFLAGS " : ['.* \(-m[0-9][0-9]*\) ']`
+test ${CXXFLAGS+set} && CXXFLAGS=`echo "$CXXFLAGS" | sed [-e 's/ *-arch  *[^ ]*//g' -e 's/ *-m32//g' -e 's/ *-m64//g']`
 ARCH_FLAG=`expr " $CFLAGS " : ['.* \(-m[0-9][0-9]*\) ']`
 test ${CFLAGS+set} && CFLAGS=`echo "$CFLAGS" | sed [-e 's/ *-arch  *[^ ]*//g' -e 's/ *-m32//g' -e 's/ *-m64//g']`
 test ${LDFLAGS+set} && LDFLAGS=`echo "$LDFLAGS" | sed [-e 's/ *-arch  *[^ ]*//g' -e 's/ *-m32//g' -e 's/ *-m64//g']`