diff --git a/cryptest.sh b/cryptest.sh
index 5afd67c9..3e3437b8 100755
--- a/cryptest.sh
+++ b/cryptest.sh
@@ -992,7 +992,11 @@ if [[ ("$IS_X86" -ne "0" || "$IS_X64" -ne "0") && ("$IS_SOLARIS" -ne "0") && ("$
 				if [[ ($(echo -n "$X86_CPU_FLAGS" | "$GREP" -c "avx2") -ne "0") ]]; then PLATFORM_CXXFLAGS+=("-D__AVX2__"); SUNCC_XARCH=avx2; fi
 				if [[ ($(echo -n "$X86_CPU_FLAGS" | "$GREP" -c "bmi") -ne "0") ]]; then PLATFORM_CXXFLAGS+=("-D__BMI__"); SUNCC_XARCH=avx2; fi
 				if [[ ($(echo -n "$X86_CPU_FLAGS" | "$GREP" -c "bmi2") -ne "0") ]]; then PLATFORM_CXXFLAGS+=("-D__BMI2__"); SUNCC_XARCH=avx2; fi
-				if [[ ($(echo -n "$X86_CPU_FLAGS" | "$GREP" -c "adx") -ne "0") ]]; then PLATFORM_CXXFLAGS+=("-D__ADX__"); SUNCC_XARCH=avx2_i; fi
+
+				# SunCC 5.13 and "illegal use of -xarch option, illegal value ignored: avx2_i"
+				if [[ ("$SUNCC_514_OR_ABOVE" -ne "0") ]]; then
+					if [[ ($(echo -n "$X86_CPU_FLAGS" | "$GREP" -c "adx") -ne "0") ]]; then PLATFORM_CXXFLAGS+=("-D__ADX__"); SUNCC_XARCH=avx2_i; fi
+				fi
 			fi
 		fi
 	fi