diff --git a/file.c b/file.c
index a24fc3187..011353e74 100644
--- a/file.c
+++ b/file.c
@@ -903,6 +903,7 @@ int parse_csv_file(const char *filename, char **params, int pnr, const char *csv
 			tmpbuf[7] = 0;
 			params[pnr++] = "time";
 			params[pnr++] = strdup(tmpbuf);
+			params[pnr++] = NULL;
 		}
 
 		ptr = strstr(mem.buffer, "ZDP");