diff --git a/cat/src/cat.f90 b/cat/src/cat.f90
index b78eb62ba984df20ef82aa7b3efc3924a9c1d1f6..2a262e08a74a3b7dd5d642f67fa727f1312698a8 100644
--- a/cat/src/cat.f90
+++ b/cat/src/cat.f90
@@ -1514,7 +1514,7 @@ if (npost > 0) then
    call guiput("GVYM" // char(0), gguiym, 1, ngx, 1)   ! v
 
    c4(:,:) = cq(:,:)
-   call guiput("CQ" // char(0), c4, nkx+1, nfy+1, 2)   ! v
+   call guiput("C4" // char(0), c4, nkx+1, nfy+1, 2)   ! v
 
 endif