diff --git a/configure.ac b/configure.ac
index 5f165412..afd5cbad 100644
--- a/configure.ac
+++ b/configure.ac
@@ -444,7 +444,7 @@ case ${ax_cv_cxx_compiler_vendor} in
         SIMD_FLAGS='-mavx2 -mfma -mf16c';;
       AVX512)
         AC_DEFINE([AVX512],[1],[AVX512 intrinsics])
-        SIMD_FLAGS='-mavx512f -mavx512pf -mavx512er -mavx512cd';;
+        SIMD_FLAGS='-mavx512f -mavx512cd';;
       SKL)
         AC_DEFINE([AVX512],[1],[AVX512 intrinsics for SkyLake Xeon])
         SIMD_FLAGS='-march=skylake-avx512';;
@@ -498,7 +498,7 @@ case ${ax_cv_cxx_compiler_vendor} in
         SIMD_FLAGS='-march=core-avx2 -xcore-avx2';;
       AVX512)
         AC_DEFINE([AVX512],[1],[AVX512 intrinsics])
-        SIMD_FLAGS='-xcore-avx512';;
+        SIMD_FLAGS='-xcommon-avx512';;
       KNC)
         AC_DEFINE([IMCI],[1],[IMCI Intrinsics for Knights Corner])
         SIMD_FLAGS='';;