diff --git a/src/cmd/compile/internal/gc/ssa.go b/src/cmd/compile/internal/gc/ssa.go
index 6b5a6a3..054fb8c 100644
--- a/src/cmd/compile/internal/gc/ssa.go
+++ b/src/cmd/compile/internal/gc/ssa.go
@@ -3519,6 +3519,11 @@
 	alias("runtime/internal/atomic", "CasRel", "runtime/internal/atomic", "Cas", lwatomics...)
 
 	alias("runtime/internal/sys", "Ctz8", "math/bits", "TrailingZeros8", all...)
+	alias("runtime/internal/sys", "TrailingZeros8", "math/bits", "TrailingZeros8", all...)
+	alias("runtime/internal/sys", "TrailingZeros64", "math/bits", "TrailingZeros64", all...)
+	alias("runtime/internal/sys", "Len8", "math/bits", "Len8", all...)
+	alias("runtime/internal/sys", "Len64", "math/bits", "Len64", all...)
+	alias("runtime/internal/sys", "OnesCount64", "math/bits", "OnesCount64", all...)
 
 	/******** math ********/
 	addF("math", "Sqrt",