diff --git a/src/cmd/ld/lib.h b/src/cmd/ld/lib.h
index 92d458a14c7..05363fc14d6 100644
--- a/src/cmd/ld/lib.h
+++ b/src/cmd/ld/lib.h
@@ -97,6 +97,8 @@ struct Segment
 	Section*	sect;
 };
 
+#pragma incomplete struct Elf64_Shdr
+
 struct Section
 {
 	uchar	rwx;