diff --git a/src/cmd/internal/obj/fips.go b/src/cmd/internal/obj/fips.go
index 11028ce602..6505ce79ee 100644
--- a/src/cmd/internal/obj/fips.go
+++ b/src/cmd/internal/obj/fips.go
@@ -144,7 +144,7 @@ import (
 	"strings"
 )
 
-const enableFIPS = false
+const enableFIPS = true
 
 // IsFIPS reports whether we are compiling one of the crypto/internal/fips/... packages.
 func (ctxt *Link) IsFIPS() bool {
@@ -201,6 +201,11 @@ func EnableFIPS() bool {
 		}
 	}
 
+	// AIX doesn't just work, and it's not worth fixing.
+	if buildcfg.GOOS == "aix" {
+		return false
+	}
+
 	return enableFIPS
 }
 
diff --git a/src/cmd/link/internal/ld/fips.go b/src/cmd/link/internal/ld/fips.go
index 8223da49d7..a88fdd822d 100644
--- a/src/cmd/link/internal/ld/fips.go
+++ b/src/cmd/link/internal/ld/fips.go
@@ -115,7 +115,7 @@ import (
 	"os"
 )
 
-const enableFIPS = false
+const enableFIPS = true
 
 // fipsSyms are the special FIPS section bracketing symbols.
 var fipsSyms = []struct {
diff --git a/src/crypto/internal/fips/check/check.go b/src/crypto/internal/fips/check/check.go
index 7c1d788437..ac64697f3f 100644
--- a/src/crypto/internal/fips/check/check.go
+++ b/src/crypto/internal/fips/check/check.go
@@ -39,7 +39,8 @@ func supported() bool {
 	case runtime.GOARCH == "wasm",
 		runtime.GOOS == "windows" && runtime.GOARCH == "386",
 		runtime.GOOS == "windows" && runtime.GOARCH == "arm",
-		runtime.GOOS == "windows" && runtime.GOARCH == "arm64":
+		runtime.GOOS == "windows" && runtime.GOARCH == "arm64",
+		runtime.GOOS == "aix":
 		return false
 	}
 	return true
diff --git a/src/crypto/internal/fips/check/check_test.go b/src/crypto/internal/fips/check/check_test.go
index a551f7c865..56d7a19503 100644
--- a/src/crypto/internal/fips/check/check_test.go
+++ b/src/crypto/internal/fips/check/check_test.go
@@ -18,7 +18,7 @@ import (
 	"unsafe"
 )
 
-const enableFIPSTest = false
+const enableFIPSTest = true
 
 func TestVerify(t *testing.T) {
 	if *Verified {