diff --git a/cmake.spec b/cmake.spec
index a2f1e34..7055ac2 100644
--- a/cmake.spec
+++ b/cmake.spec
@@ -496,6 +496,7 @@ mv -f Modules/FindLibArchive.disabled Modules/FindLibArchive.cmake
 - Update to 3.16.2
 - Use %%_vpath_builddir for out-of-tree build
 - Use %%set_build_flags to export build flags if available
+- Use %%set_build_flags inside macros.cmake if available
 
 * Tue Jan 14 2020 Miro Hrončok <mhroncok@redhat.com> - 3.16.1-2
 - FindPython: Add support for version 3.9
diff --git a/macros.cmake b/macros.cmake
index 572d3e4..7f24b69 100644
--- a/macros.cmake
+++ b/macros.cmake
@@ -14,11 +14,15 @@
 # - Set default install prefixes and library install directories
 # - Turn on shared libraries by default
 %cmake \
+  %if 0%{?set_build_flags:1} \
+  %set_build_flags \
+  %else \
   CFLAGS="${CFLAGS:-%optflags}" ; export CFLAGS ; \
   CXXFLAGS="${CXXFLAGS:-%optflags}" ; export CXXFLAGS ; \
   FFLAGS="${FFLAGS:-%optflags%{?_fmoddir: -I%_fmoddir}}" ; export FFLAGS ; \
   FCFLAGS="${FCFLAGS:-%optflags%{?_fmoddir: -I%_fmoddir}}" ; export FCFLAGS ; \
   %{?__global_ldflags:LDFLAGS="${LDFLAGS:-%__global_ldflags}" ; export LDFLAGS ;} \
+  %endif \
   %__cmake \\\
         -DCMAKE_C_FLAGS_RELEASE:STRING="-DNDEBUG" \\\
         -DCMAKE_CXX_FLAGS_RELEASE:STRING="-DNDEBUG" \\\