diff --git a/package/ficl/ficl.mk b/package/ficl/ficl.mk
index 5d2d600a81..af900fa2cf 100644
--- a/package/ficl/ficl.mk
+++ b/package/ficl/ficl.mk
@@ -39,7 +39,7 @@ endif
 
 define FICL_BUILD_CMDS
 	$(MAKE) -C $(@D) -f Makefile.linux $(TARGET_CONFIGURE_OPTS) \
-		CFLAGS="$(TARGET_CFLAGS) -fPIC -I. -Dlinux" CPPFLAGS="" $(FICL_BUILD_TARGETS)
+		CFLAGS="$(TARGET_CFLAGS) -fgnu89-inline -fPIC -I. -Dlinux" CPPFLAGS="" $(FICL_BUILD_TARGETS)
 endef
 
 define FICL_INSTALL_STAGING_CMDS