diff --git a/net/ipv4/gre_demux.c b/net/ipv4/gre_demux.c
index 0485bf7f8f030d59bc6e9ee499051e99d9ab53d6..7e0756da873776aad0e534d0c85ed08629878ed4 100644
--- a/net/ipv4/gre_demux.c
+++ b/net/ipv4/gre_demux.c
@@ -125,6 +125,10 @@ static int parse_gre_header(struct sk_buff *skb, struct tnl_ptk_info *tpi,
 			*csum_err = true;
 			return -EINVAL;
 		}
+
+		skb_checksum_try_convert(skb, IPPROTO_GRE, 0,
+					 null_compute_pseudo);
+
 		options++;
 	}
 
diff --git a/net/ipv4/gre_offload.c b/net/ipv4/gre_offload.c
index a4d7965fb8809de8ed1305d5afa2cf3142030c0b..d3fe2ac05167230985e44a4cfc2150b279717dc0 100644
--- a/net/ipv4/gre_offload.c
+++ b/net/ipv4/gre_offload.c
@@ -172,10 +172,14 @@ static struct sk_buff **gre_gro_receive(struct sk_buff **head,
 	}
 
 	/* Don't bother verifying checksum if we're going to flush anyway. */
-	if ((greh->flags & GRE_CSUM) && !NAPI_GRO_CB(skb)->flush &&
-	    skb_gro_checksum_simple_validate(skb))
+	if ((greh->flags & GRE_CSUM) && !NAPI_GRO_CB(skb)->flush) {
+		if (skb_gro_checksum_simple_validate(skb))
 			goto out_unlock;
 
+		skb_gro_checksum_try_convert(skb, IPPROTO_GRE, 0,
+					     null_compute_pseudo);
+	}
+
 	flush = 0;
 
 	for (p = *head; p; p = p->next) {