diff --git a/check_commit_mesonh.sh b/check_commit_mesonh.sh
index 68e80936db2ce39702d5961bf0c5cfec5970432b..11c8ae28fe90c7ee73d1fa4591fbaf48903cbfba 100755
--- a/check_commit_mesonh.sh
+++ b/check_commit_mesonh.sh
@@ -181,8 +181,10 @@ if [ $compilation -eq 1 ]; then
   find PHYEX -type f -exec touch {} \; #to be sure a recompilation occurs
 
   # Move manually ext/ files in src/MNH
-  mv -f PHYEX/ext/* MNH/
-  rmdir PHYEX/ext
+  if [ -d PHYEX/ext ]; then
+    mv -f PHYEX/ext/* MNH/
+    rmdir PHYEX/ext
+  ]
 
   cd $MNHPACK/$name/src/PHYEX/turb
   # Delete files of MNH-V5-5-0/src/MNH and MNH/src/LIB/SURCOUCHE/src with same name