diff --git a/graphics/blender-doc/Makefile b/graphics/blender-doc/Makefile
index b7267d33b5fb..c44875c3e828 100644
--- a/graphics/blender-doc/Makefile
+++ b/graphics/blender-doc/Makefile
@@ -19,7 +19,7 @@ SUB_FILES=	pkg-message
 
 .include <bsd.port.pre.mk>
 
-.if ${OSVERSION} < 1100077
+.if ${OPSYS} == FreeBSD && ${OSVERSION} < 1100077
 post-extract:
 # chmod -R bug.
 # Do not use "-exec ... +", because of the same bug, it will not work.