diff --git a/cc/config/arm64_device.go b/cc/config/arm64_device.go
index 73cee5cce..172784a7c 100644
--- a/cc/config/arm64_device.go
+++ b/cc/config/arm64_device.go
@@ -53,15 +53,12 @@ var (
 			"-mcpu=cortex-a53",
 		},
 		"cortex-a55": []string{
-			// The cortex-a55 target is not yet supported,
-			// so use cortex-a53.
-			"-mcpu=cortex-a53",
+			"-mcpu=cortex-a55",
 		},
 		"cortex-a75": []string{
-			// Use the cortex-a53 since it is similar to the little
+			// Use the cortex-a55 since it is similar to the little
 			// core (cortex-a55) and is sensitive to ordering.
-			// The cortex-a55 target is not yet supported.
-			"-mcpu=cortex-a53",
+			"-mcpu=cortex-a55",
 		},
 		"kryo": []string{
 			// Use the cortex-a57 cpu since some compilers
diff --git a/cc/config/arm_device.go b/cc/config/arm_device.go
index 398df90de..4719fb715 100644
--- a/cc/config/arm_device.go
+++ b/cc/config/arm_device.go
@@ -100,7 +100,7 @@ var (
 			"-D__ARM_FEATURE_LPAE=1",
 		},
 		"cortex-a55": []string{
-			"-mcpu=cortex-a53",
+			"-mcpu=cortex-a55",
 			"-mfpu=neon-fp-armv8",
 			// Fake an ARM compiler flag as these processors support LPAE which GCC/clang
 			// don't advertise.
@@ -109,7 +109,7 @@ var (
 			"-D__ARM_FEATURE_LPAE=1",
 		},
 		"cortex-a75": []string{
-			"-mcpu=cortex-a53",
+			"-mcpu=cortex-a55",
 			"-mfpu=neon-fp-armv8",
 			// Fake an ARM compiler flag as these processors support LPAE which GCC/clang
 			// don't advertise.