diff --git a/MPI/hdf5/build b/MPI/hdf5/build
index 061d7fb..f963ce3 100755
--- a/MPI/hdf5/build
+++ b/MPI/hdf5/build
@@ -15,6 +15,7 @@ pbuild::configure() {
 		--enable-cxx \
 		--enable-fortran \
 		--enable-unsupported \
+		--enable-threadsafe \
 		--with-pic \
 		|| exit 1
 }