diff --git a/package/network/utils/iwinfo/Makefile b/package/network/utils/iwinfo/Makefile
index 165fb4b67f..bc79992138 100644
--- a/package/network/utils/iwinfo/Makefile
+++ b/package/network/utils/iwinfo/Makefile
@@ -81,7 +81,7 @@ TARGET_CFLAGS += \
 
 MAKE_FLAGS += \
 	FPIC="$(FPIC)" \
-	CFLAGS="$(TARGET_CFLAGS)" \
+	CFLAGS="$(TARGET_CFLAGS) $(TARGET_CPPFLAGS)" \
 	LDFLAGS="$(TARGET_LDFLAGS)" \
 	BACKENDS="nl80211" \
 	SOVERSION="$(IWINFO_ABI_VERSION)"