diff --git a/utils/jq/Makefile b/utils/jq/Makefile
index 053063e33..d5ffdd091 100644
--- a/utils/jq/Makefile
+++ b/utils/jq/Makefile
@@ -24,7 +24,7 @@ ifdef CONFIG_USE_MIPS16
   TARGET_CFLAGS += -fno-ipa-sra
 endif
 
-TARGET_CFLAGS += -std=c99
+TARGET_CFLAGS += -std=c99 -D_GNU_SOURCE
 
 CONFIGURE_ARGS+= \
 	--disable-docs \