diff --git a/package/grep/grep.mk b/package/grep/grep.mk
index e07f169188..2c2477c882 100644
--- a/package/grep/grep.mk
+++ b/package/grep/grep.mk
@@ -9,7 +9,8 @@ GREP_SITE = $(BR2_GNU_MIRROR)/grep
 GREP_SOURCE = grep-$(GREP_VERSION).tar.xz
 GREP_LICENSE = GPLv3+
 GREP_LICENSE_FILES = COPYING
-GREP_CONF_OPTS = --disable-perl-regexp --without-included-regex
+GREP_CONF_OPTS = --disable-perl-regexp \
+	$(if $(BR2_TOOLCHAIN_USES_MUSL),--with-included-regex)
 GREP_DEPENDENCIES = $(if $(BR2_NEEDS_GETTEXT_IF_LOCALE),gettext)
 
 # link with iconv if enabled