diff --git a/source/mod_save.f90 b/source/mod_save.f90
index ec3c9779d23e3790759c1ca761440e7bdc48c6e2..9c8b2de1366d3ec33805b732a7de096fd2805413 100644
--- a/source/mod_save.f90
+++ b/source/mod_save.f90
@@ -466,6 +466,8 @@ module mod_save
     xpos(:,:,:) = 0.
     epri(:,:,:) = 0.
     epos(:,:,:) = 0.
+    mcpri(:,:,:) = 0.
+    mcpos(:,:,:) = 0.
     do n = 1, ntstate
       do jy = 1, nyregrid
         do ix = 1, nxregrid