diff --git a/Overlap/eddy_graph.f90 b/Overlap/eddy_graph.f90
index 49c29c78dca8200a20d666aaf551d779c057c0a2..c9b5e8492f275a67475098d411ac850b16b1d3e0 100644
--- a/Overlap/eddy_graph.f90
+++ b/Overlap/eddy_graph.f90
@@ -24,7 +24,8 @@ program eddy_graph
 
   integer rank, n_proc, copy, delta, j
   integer:: n_dates = huge(0) ! number of dates to read
-  integer d_init, k_begin, k_end, k, k_end_main_loop
+  integer k ! date
+  integer d_init, k_begin, k_end, k_end_main_loop
   character(len = :), allocatable:: shpc_dir
   integer:: max_delta = 1
   
diff --git a/Overlap/get_snapshot.f90 b/Overlap/get_snapshot.f90
index a5a737a990f532993ec2f97fc65e95f254eef39d..dd905cd5273ff2bc5ff2aa7fc4b941292eab3a9f 100644
--- a/Overlap/get_snapshot.f90
+++ b/Overlap/get_snapshot.f90
@@ -26,7 +26,7 @@ contains
     TYPE(shpc), intent(in):: hshp
 
     integer, intent(in):: d_init
-    ! first date index in the collection of shapefiles
+    ! first date in the collection of shapefiles, in days since 1950-1-1
 
     integer, intent(in):: k ! date index
     integer, intent(in):: k_end ! last date index analyzed by this MPI process