diff --git a/m4/ax_mexopts.m4 b/m4/ax_mexopts.m4
index e788513453965937bd46023f36f1f05c47f13c8b..eff7dc0c905bca5d65a738def4883795cc5bc7be 100644
--- a/m4/ax_mexopts.m4
+++ b/m4/ax_mexopts.m4
@@ -65,12 +65,11 @@ case ${MATLAB_ARCH} in
     ax_mexopts_ok="yes"
     ;;
   maci64)
-    MACOSX_DEPLOYMENT_TARGET='10.9'
     MATLAB_DEFS="$MATLAB_DEFS -DNDEBUG"
-    MATLAB_CFLAGS="-fno-common -mmacosx-version-min=$MACOSX_DEPLOYMENT_TARGET -fexceptions"
+    MATLAB_CFLAGS="-fno-common -fexceptions"
     MATLAB_CXXFLAGS="$MATLAB_CFLAGS"
     MATLAB_FCFLAGS="-g -O2 -fexceptions -fbackslash"
-    MATLAB_LDFLAGS_NOMAP="-Wl,-twolevel_namespace -undefined error -mmacosx-version-min=$MACOSX_DEPLOYMENT_TARGET -bundle"
+    MATLAB_LDFLAGS_NOMAP="-Wl,-twolevel_namespace -undefined error -bundle"
     MATLAB_LDFLAGS="$MATLAB_LDFLAGS_NOMAP -Wl,-exported_symbols_list,\$(abs_top_srcdir)/mexFunction-MacOSX.map"
     # This -L flag is put here, hence later on the linker command line, so as
     # to avoid linking against the HDF5 shipped by MATLAB (which would