diff --git a/utils/nightly/gmsh_mac.ctest b/utils/nightly/gmsh_mac.ctest
index 5f32ee12be3efcd5e5a412c1654ba769ff72b453..73132aa6ecf8f07c701a54cfbe1b301938de6cc4 100644
--- a/utils/nightly/gmsh_mac.ctest
+++ b/utils/nightly/gmsh_mac.ctest
@@ -19,7 +19,7 @@ else(BUILD_DYNAMIC)
 endif(BUILD_DYNAMIC)
 set(OPT "-DGMSH_EXTRA_VERSION=${EXTRA_VERSION}")
 set(OPT "${OPT} -DCMAKE_PREFIX_PATH:path=/usr/local/opencascade;/usr/local")
-set(OPT "${OPT} -DCMAKE_CXX_FLAGS=-mmacosx-version-min=10.5")
+set(OPT "${OPT} -DCMAKE_CXX_FLAGS=-mmacosx-version-min=10.6")
 set(OPT "${OPT} -DPETSC_ARCH=macosx_complex_mumps_seq")
 set(OPT "${OPT} -DPETSC_DIR=$ENV{HOME}/src/petsc-3.1-p8")
 set(OPT "${OPT} -DSLEPC_DIR=$ENV{HOME}/src/slepc-3.1-p6")