diff --git a/VERSION b/VERSION
index cb917cf0..283b9214 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-8.3.46
+8.3.47
diff --git a/extract/ExtCell.c b/extract/ExtCell.c
index 8d7c1751..50c80ceb 100644
--- a/extract/ExtCell.c
+++ b/extract/ExtCell.c
@@ -308,6 +308,8 @@ extHeader(def, f)
     bool propfound;
     char *propvalue;
 
+    ASSERT(DBTechName != NULL, "extHeader");
+
     /* Output a timestamp (should be first) */
     fprintf(f, "timestamp %d\n", def->cd_timestamp);