diff --git a/eclass/qt6-build.eclass b/eclass/qt6-build.eclass
index 2990b41a9e959..18f317e32e165 100644
--- a/eclass/qt6-build.eclass
+++ b/eclass/qt6-build.eclass
@@ -258,12 +258,13 @@ _qt6-build_match_cpu_flags() {
 				[[ ${intrin} ]] && flags+=( -mno-${intrin} )
 			done
 	done < <(
-		# TODO: review if can drop fma= matching after QTBUG-116357
+		# TODO: drop ver_test and ${fma} when <6.5.3 is gone
+		ver_test ${PV} -ge 6.5.3 && fma= || fma=fma
 		$(tc-getCXX) -E -P ${CXXFLAGS} ${CPPFLAGS} - <<-EOF | tail -n 2
 			#if defined(__GNUC__) && (defined(__x86_64__) || defined(__i386__))
 			#include <x86intrin.h>
 			#endif
-			avx2=__AVX2__ =__BMI__ =__BMI2__ =__F16C__ fma=__FMA__ =__LZCNT__ =__POPCNT__
+			avx2=__AVX2__ =__BMI__ =__BMI2__ =__F16C__ ${fma}=__FMA__ =__LZCNT__ =__POPCNT__
 			avx512f=__AVX512F__ avx512bw=__AVX512BW__ avx512cd=__AVX512CD__ avx512dq=__AVX512DQ__ avx512vl=__AVX512VL__
 		EOF
 		assert