diff --git a/pfstools.spec b/pfstools.spec
index 03492db..350d67c 100644
--- a/pfstools.spec
+++ b/pfstools.spec
@@ -1,6 +1,6 @@
 Name:		pfstools
 Version:	2.1.0
-Release:	13%{?dist}
+Release:	14%{?dist}
 Summary:	Programs for handling high-dynamic range images
 
 License:	GPLv2+
@@ -129,6 +129,9 @@ etc., for developing programs which can handle HDR graphics files.
 
 %build
 %{?el7:export CXXFLAGS="%{optflags} -std=gnu++11"}
+%if 0%{?fedora} >= 33
+export CXXFLAGS="%{optflags} -std=gnu++11"
+%endif
 mkdir -p %{_target_platform}
 %{cmake} -B %{_target_platform} -DBUILD_SHARED_LIBS=ON -DLIB_DIR=%{_lib} -DWITH_OpenCV=OFF .
 make -C %{_target_platform}
@@ -298,6 +301,9 @@ make -C %{_target_platform}
 %{_includedir}/pfs
 
 %changelog
+* Tue Aug 14 2020 Jeff Law <law@redhat.com> - 2.1.0-14
+- Force C++11 as this code is not C++17 ready
+
 * Thu Aug 06 2020 Tomas Smetana <tsmetana@redhat.com> - 2.1.0-13
 - Fix #1865214: Update spec for new cmake