diff --git a/devel/spdlog/Makefile b/devel/spdlog/Makefile
index 8fdb9a0dc8f4..630d246d02fb 100644
--- a/devel/spdlog/Makefile
+++ b/devel/spdlog/Makefile
@@ -1,31 +1,35 @@
 PORTNAME=	spdlog
 DISTVERSIONPREFIX=	v
 DISTVERSION=	1.15.2
-PORTREVISION=	0
+PORTREVISION=	1
 CATEGORIES=	devel
 
 MAINTAINER=	vanilla@FreeBSD.org
 COMMENT=	Super fast C++ logging library
 WWW=		https://github.com/gabime/spdlog
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 LIB_DEPENDS=	libfmt.so:devel/libfmt
 
 USES=		cmake compiler:c++11-lib pathfix
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	gabime
 USE_LDCONFIG=	yes
 CMAKE_ON=	SPDLOG_BUILD_SHARED SPDLOG_FMT_EXTERNAL
 CMAKE_OFF=	SPDLOG_BUILD_BENCH
 PLIST_SUB=	SOVERSION="${DISTVERSION}"
 
 post-extract:
 	${RM} -r ${WRKSRC}/include/spdlog/fmt/bundled
 
 post-patch:
 	${RM} ${WRKSRC}/include/spdlog/fmt/*.h.orig
 
+post-stage:
+# let consumers know that this package was compiled with SPDLOG_FMT_EXTERNAL=yes
+	${ECHO_CMD} '#define SPDLOG_FMT_EXTERNAL' >> ${WRKSRC}/include/spdlog/tweakme.h
+
 .include <bsd.port.mk>