diff --git a/src/cmd/compile/internal/ssagen/ssa.go b/src/cmd/compile/internal/ssagen/ssa.go
index f31cf29925..2e2a6b411b 100644
--- a/src/cmd/compile/internal/ssagen/ssa.go
+++ b/src/cmd/compile/internal/ssagen/ssa.go
@@ -4000,10 +4000,10 @@ func InitTables() {
 		},
 		sys.ARM64, sys.PPC64)
 
-	/* Use only on Power10 as the new byte reverse instructions that Power10 provide
-	   make it worthwhile as an intrinsic */
-	brev_arch := []sys.ArchFamily{sys.AMD64, sys.ARM64, sys.ARM, sys.S390X}
+	brev_arch := []sys.ArchFamily{sys.AMD64, sys.I386, sys.ARM64, sys.ARM, sys.S390X}
 	if buildcfg.GOPPC64 >= 10 {
+		// Use only on Power10 as the new byte reverse instructions that Power10 provide
+		// make it worthwhile as an intrinsic
 		brev_arch = append(brev_arch, sys.PPC64)
 	}
 	/******** runtime/internal/sys ********/
diff --git a/test/codegen/mathbits.go b/test/codegen/mathbits.go
index 0eed27a619..86a44d7c93 100644
--- a/test/codegen/mathbits.go
+++ b/test/codegen/mathbits.go
@@ -189,6 +189,7 @@ func OnesCount8(n uint8) int {
 
 func ReverseBytes(n uint) uint {
 	// amd64:"BSWAPQ"
+	// 386:"BSWAPL"
 	// s390x:"MOVDBR"
 	// arm64:"REV"
 	return bits.ReverseBytes(n)
@@ -196,6 +197,7 @@ func ReverseBytes(n uint) uint {
 
 func ReverseBytes64(n uint64) uint64 {
 	// amd64:"BSWAPQ"
+	// 386:"BSWAPL"
 	// s390x:"MOVDBR"
 	// arm64:"REV"
 	// ppc64x/power10: "BRD"
@@ -204,6 +206,7 @@ func ReverseBytes64(n uint64) uint64 {
 
 func ReverseBytes32(n uint32) uint32 {
 	// amd64:"BSWAPL"
+	// 386:"BSWAPL"
 	// s390x:"MOVWBR"
 	// arm64:"REVW"
 	// ppc64x/power10: "BRW"