diff --git a/ThirdParty/Ert/libecl/src/ecl_rsthead.c b/ThirdParty/Ert/libecl/src/ecl_rsthead.c
index 571bafe377..5bc06e2aa3 100644
--- a/ThirdParty/Ert/libecl/src/ecl_rsthead.c
+++ b/ThirdParty/Ert/libecl/src/ecl_rsthead.c
@@ -86,7 +86,8 @@ ecl_rsthead_type * ecl_rsthead_alloc_from_kw( int report_step , const ecl_kw_typ
       // The only derived quantity
       rsthead->sim_time  = rsthead_date( rsthead->day , rsthead->month , rsthead->year );
   }
-  rsthead->sim_days = ecl_kw_iget_double( doubhead_kw , DOUBHEAD_DAYS_INDEX );
+  if (doubhead_kw)
+      rsthead->sim_days = ecl_kw_iget_double( doubhead_kw , DOUBHEAD_DAYS_INDEX );
   if (logihead_kw)
     rsthead->dualp    = ecl_kw_iget_bool( logihead_kw , LOGIHEAD_DUALP_INDEX);
 
@@ -97,12 +98,16 @@ ecl_rsthead_type * ecl_rsthead_alloc_from_kw( int report_step , const ecl_kw_typ
  ecl_rsthead_type * ecl_rsthead_ialloc( const ecl_file_type * rst_file , int occurence) {
   if (ecl_file_get_num_named_kw( rst_file , INTEHEAD_KW) > occurence) {
     const ecl_kw_type * intehead_kw = ecl_file_iget_named_kw( rst_file , INTEHEAD_KW , occurence);
-    const ecl_kw_type * doubhead_kw = ecl_file_iget_named_kw( rst_file , DOUBHEAD_KW , occurence);
+    const ecl_kw_type * doubhead_kw = NULL;
     const ecl_kw_type * logihead_kw = NULL;
     int report_step;
     if (ecl_file_get_num_named_kw(rst_file, LOGIHEAD_KW) > occurence)
       logihead_kw = ecl_file_iget_named_kw( rst_file , LOGIHEAD_KW , occurence);
 
+    if (ecl_file_get_num_named_kw(rst_file, DOUBHEAD_KW) > occurence) {
+        doubhead_kw = ecl_file_iget_named_kw(rst_file, DOUBHEAD_KW, occurence);
+    }
+
     if (ecl_file_get_num_named_kw( rst_file , SEQNUM_KW) > occurence) {
       const ecl_kw_type * seqnum_kw = ecl_file_iget_named_kw( rst_file , SEQNUM_KW , occurence );
       report_step = ecl_kw_iget_int( seqnum_kw , 0);