Index: cdr/cdr_pgsql.c
===================================================================
--- cdr/cdr_pgsql.c	(revision 298335)
+++ cdr/cdr_pgsql.c	(working copy)
@@ -216,12 +216,12 @@
 					LENGTHEN_BUF2(13);
 					ast_str_append(&sql2, 0, "%s%s", first ? "" : ",", value);
 				} else if (strncmp(cur->type, "float", 5) == 0) {
-					struct timeval *when = cur->name[0] == 'd' ? &cdr->start : &cdr->answer;
+					struct timeval *when = cur->name[0] == 'd' ? &cdr->start : ast_tvzero(cdr->answer) ? &cdr->end : &cdr->answer;
 					LENGTHEN_BUF2(31);
 					ast_str_append(&sql2, 0, "%s%f", first ? "" : ",", (double) (ast_tvdiff_us(cdr->end, *when) / 1000000.0));
 				} else {
 					/* Char field, probably */
-					struct timeval *when = cur->name[0] == 'd' ? &cdr->start : &cdr->answer;
+					struct timeval *when = cur->name[0] == 'd' ? &cdr->start : ast_tvzero(cdr->answer) ? &cdr->end : &cdr->answer;
 					LENGTHEN_BUF2(31);
 					ast_str_append(&sql2, 0, "%s'%f'", first ? "" : ",", (double) (ast_tvdiff_us(cdr->end, *when) / 1000000.0));
 				}