diff --git a/zxing-cpp.changes b/zxing-cpp.changes
index 1535bf3..1aa2321 100644
--- a/zxing-cpp.changes
+++ b/zxing-cpp.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Thu Nov 30 14:32:19 UTC 2023 - Guillaume GARDET <guillaume.gardet@opensuse.org>
+
+- Add back %{optflags} in c++ flags
+  This was unintentionally disabled when c++17 was forced
+
 -------------------------------------------------------------------
 Fri Oct  6 06:01:16 UTC 2023 - Paolo Stivanin <info@paolostivanin.com>
 
diff --git a/zxing-cpp.spec b/zxing-cpp.spec
index d621b30..e97af5c 100644
--- a/zxing-cpp.spec
+++ b/zxing-cpp.spec
@@ -79,7 +79,7 @@ other applications.
 export CC="gcc-7"
 export CXX="g++-7"
 %endif
-export CXXFLAGS="-std=c++17"
+export CXXFLAGS="%{optflags} -std=c++17"
 # Examples require QT5-base/multimedia, but doing so creates a cycle
 # Blackbox tests require fmt
 %cmake \