diff --git a/devel/cmake/Portfile b/devel/cmake/Portfile
index 25a038f751927..f047900a5c9c6 100644
--- a/devel/cmake/Portfile
+++ b/devel/cmake/Portfile
@@ -4,6 +4,11 @@ PortSystem          1.0
 PortGroup           muniversal 1.0
 PortGroup           compiler_blacklist_versions 1.0
 
+# require C++11 as of 2017-08-21
+# release 3.9.3 was 2017-09-20
+# https://gitlab.kitware.com/cmake/cmake/commit/c1f3eb9f2d628b2911aa17f65012fab0befc4b87
+PortGroup cxx11 1.1
+
 name                cmake
 
 categories          devel
@@ -83,10 +88,6 @@ if {${subport} eq ${name}} {
         patch-CMakeFindFrameworks.cmake.devel.diff \
         patch-Source_CMakeVersionCompute.cmake.devel.diff
 
-    # require C++11 as of 2017-08-21
-    # https://gitlab.kitware.com/cmake/cmake/commit/c1f3eb9f2d628b2911aa17f65012fab0befc4b87
-    PortGroup cxx11 1.1
-
     livecheck.type  regex
     livecheck.regex /cmake/cmake/commit/(\[0-9a-g\]+)
     livecheck.version ${commit}