diff --git a/src/cmd/compile/internal/ssagen/ssa.go b/src/cmd/compile/internal/ssagen/ssa.go
index 08114b7828..5a958a569d 100644
--- a/src/cmd/compile/internal/ssagen/ssa.go
+++ b/src/cmd/compile/internal/ssagen/ssa.go
@@ -4421,7 +4421,7 @@ func InitTables() {
 		func(s *state, n *ir.CallExpr, args []*ssa.Value) *ssa.Value {
 			return s.newValue1(ssa.OpBitLen32, types.Types[types.TINT], args[0])
 		},
-		sys.AMD64, sys.ARM64)
+		sys.AMD64, sys.ARM64, sys.PPC64)
 	addF("math/bits", "Len32",
 		func(s *state, n *ir.CallExpr, args []*ssa.Value) *ssa.Value {
 			if s.config.PtrSize == 4 {
@@ -4430,7 +4430,7 @@ func InitTables() {
 			x := s.newValue1(ssa.OpZeroExt32to64, types.Types[types.TUINT64], args[0])
 			return s.newValue1(ssa.OpBitLen64, types.Types[types.TINT], x)
 		},
-		sys.ARM, sys.S390X, sys.MIPS, sys.PPC64, sys.Wasm)
+		sys.ARM, sys.S390X, sys.MIPS, sys.Wasm)
 	addF("math/bits", "Len16",
 		func(s *state, n *ir.CallExpr, args []*ssa.Value) *ssa.Value {
 			if s.config.PtrSize == 4 {
diff --git a/test/codegen/mathbits.go b/test/codegen/mathbits.go
index 2d8790c1de..859490c363 100644
--- a/test/codegen/mathbits.go
+++ b/test/codegen/mathbits.go
@@ -93,6 +93,8 @@ func Len32(n uint32) int {
 	// arm:"CLZ" arm64:"CLZ"
 	// mips:"CLZ"
 	// wasm:"I64Clz"
+	// ppc64: "CNTLZW"
+	// ppc64le: "CNTLZW"
 	return bits.Len32(n)
 }