diff --git a/tools/toolchain/scripts/stage1/install_mpich.sh b/tools/toolchain/scripts/stage1/install_mpich.sh
index 0a1fa7a5b3..3a583d20bd 100755
--- a/tools/toolchain/scripts/stage1/install_mpich.sh
+++ b/tools/toolchain/scripts/stage1/install_mpich.sh
@@ -159,6 +159,8 @@ cat << EOF >> ${INSTALLDIR}/lsan.supp
 # MPICH 3.3.2 with GCC 10.3.0
 leak:MPIR_Find_local_and_external
 leak:MPIU_Find_local_and_external
+# MPICH 4.2.3
+leak:MPL_malloc
 EOF
 
 load "${BUILDDIR}/setup_mpich"