diff --git a/lib/asn1/asn1-template.h b/lib/asn1/asn1-template.h
index 07c4461e3..c3a21a13f 100644
--- a/lib/asn1/asn1-template.h
+++ b/lib/asn1/asn1-template.h
@@ -184,7 +184,7 @@
 
 struct asn1_template {
     uint32_t tt;
-    uint32_t offset;
+    int32_t  offset;
     const void *ptr;
 };