diff --git a/devtools/print_wire.c b/devtools/print_wire.c
index e0c68a0ef..675fe458f 100644
--- a/devtools/print_wire.c
+++ b/devtools/print_wire.c
@@ -198,7 +198,7 @@ void printwire_tlvs(const char *fieldname, const u8 **cursor, size_t *plen,
 			printf("}\n");
 			*plen -= length;
 		} else
-			printf("**TYPE #%ld UNKNOWN for TLV %s**\n", type, fieldname);
+			printf("**TYPE #%"PRIu64" UNKNOWN for TLV %s**\n", type, fieldname);
 	}
 	return;
 
diff --git a/tools/test/enum.c b/tools/test/enum.c
index 67cef3c22..df77744bc 100644
--- a/tools/test/enum.c
+++ b/tools/test/enum.c
@@ -8,7 +8,7 @@ void towire_test_enum(u8 **pptr, const enum test_enum test_enum)
 
 enum test_enum fromwire_test_enum(const u8 **cursor, size_t *max)
 {
-	printf("fromwire_test_enum at %ld\n", *max);
+	printf("fromwire_test_enum at %zu\n", *max);
 	return TEST_ONE;
 }