diff --git a/sources/interpolations.F90 b/sources/interpolations.F90
index 56295b9..3a4c406 100644
--- a/sources/interpolations.F90
+++ b/sources/interpolations.F90
@@ -386,7 +386,7 @@ module interpolations
       interfaces         => interfaces_dir
       reconstruct_states => reconstruct_ocmp7
       order              = 7
-      nghosts            = max(nghosts, 4)
+      nghosts            = max(nghosts, 6)
     case ("ocmp9", "OCMP9")
       name_rec           =  "9th order Optimized Compact Monotonicity Preserving"
       interfaces         => interfaces_dir