diff --git a/src/cmd/6l/asm.c b/src/cmd/6l/asm.c
index c976ac50e48..6dffa20f24a 100644
--- a/src/cmd/6l/asm.c
+++ b/src/cmd/6l/asm.c
@@ -829,6 +829,7 @@ asmb(void)
 			}
 			break;
 		case Hwindows:
+			seek(cout, symo, 0);
 			if(debug['v'])
 			       Bprint(&bso, "%5.2f dwarf\n", cputime());