diff --git a/macros b/macros
index 2eca9bb..cc0f895 100644
--- a/macros
+++ b/macros
@@ -86,13 +86,14 @@
 # have not been set already.  RPM_OPT_FLAGS and RPM_LD_FLAGS have already
 # been set implicitly at the start of the %%build section.
 # LT_SYS_LIBRARY_PATH is used by libtool script.
+# RUSTFLAGS is only set when %%{build_rustflags} is available.
 %set_build_flags \
   CFLAGS="${CFLAGS:-%{build_cflags}}" ; export CFLAGS ; \
   CXXFLAGS="${CXXFLAGS:-%{build_cxxflags}}" ; export CXXFLAGS ; \
   FFLAGS="${FFLAGS:-%{build_fflags}}" ; export FFLAGS ; \
   FCFLAGS="${FCFLAGS:-%{build_fflags}}" ; export FCFLAGS ; \
-  VALAFLAGS="${VALAFLAGS:-%{build_valaflags}}" ; export VALAFLAGS ; \
-  RUSTFLAGS="${RUSTFLAGS:-%{build_rustflags}}" ; export RUSTFLAGS ; \
+  VALAFLAGS="${VALAFLAGS:-%{build_valaflags}}" ; export VALAFLAGS ;%{?build_rustflags:
+  RUSTFLAGS="${RUSTFLAGS:-%{build_rustflags}}" ; export RUSTFLAGS ;} \
   LDFLAGS="${LDFLAGS:-%{build_ldflags}}" ; export LDFLAGS ; \
   LT_SYS_LIBRARY_PATH="${LT_SYS_LIBRARY_PATH:-%_libdir:}" ; export LT_SYS_LIBRARY_PATH ; \
   CC="${CC:-%{__cc}}" ; export CC ; \
diff --git a/redhat-rpm-config.spec b/redhat-rpm-config.spec
index aaf3a16..c15643e 100644
--- a/redhat-rpm-config.spec
+++ b/redhat-rpm-config.spec
@@ -4,7 +4,7 @@
 # 2) When making changes, increment the version (in baserelease) by 1.
 #    rpmdev-bumpspec and other tools update the macro below, which is used
 #    in Version: to get the desired effect.
-%global baserelease 274
+%global baserelease 275
 
 Summary: Red Hat specific rpm configuration files
 Name: redhat-rpm-config
@@ -256,7 +256,10 @@ install -p -m 644 -t %{buildroot}%{_rpmluadir}/fedora common.lua
 %doc buildflags.md
 
 %changelog
-* Wed Jan  3 2024 Florian Weimer <fweimer@redhat.com> - 275-1
+* Fri Jan 05 2024 Yaakov Selkowitz <yselkowi@redhat.com> - 275-1
+- Define RUSTFLAGS only when rust macros are installed
+
+* Wed Jan  3 2024 Florian Weimer <fweimer@redhat.com> - 274-1
 - Missing packed relative relocation support on aarch64, s390x (#2256645)
 
 * Tue Jan  2 2024 Florian Weimer <fweimer@redhat.com> - 273-1