diff --git a/gas/NEWS b/gas/NEWS
index 4ae2089901c..05fbed113c2 100644
--- a/gas/NEWS
+++ b/gas/NEWS
@@ -1,5 +1,7 @@
 -*- text -*-
 
+* Add SME2 support to the AArch64 port.
+
 Changes in 2.40:
 
 * Add support for Intel RAO-INT instructions.
diff --git a/gas/config/tc-aarch64.c b/gas/config/tc-aarch64.c
index 2d4c6106506..6ebfcda7dff 100644
--- a/gas/config/tc-aarch64.c
+++ b/gas/config/tc-aarch64.c
@@ -10183,6 +10183,8 @@ static const struct aarch64_option_cpu_value_table aarch64_features[] = {
 			AARCH64_FEATURE (AARCH64_FEATURE_SME, 0)},
   {"sme-i16i64",	AARCH64_FEATURE (AARCH64_FEATURE_SME_I16I64, 0),
 			AARCH64_FEATURE (AARCH64_FEATURE_SME, 0)},
+  {"sme2",		AARCH64_FEATURE (AARCH64_FEATURE_SME2, 0),
+			AARCH64_FEATURE (AARCH64_FEATURE_SME, 0)},
   {"bf16",		AARCH64_FEATURE (AARCH64_FEATURE_BFLOAT16, 0),
 			AARCH64_FEATURE (AARCH64_FEATURE_FP, 0)},
   {"i8mm",		AARCH64_FEATURE (AARCH64_FEATURE_I8MM, 0),
diff --git a/gas/doc/c-aarch64.texi b/gas/doc/c-aarch64.texi
index 3921c0d368e..acde4a77dd2 100644
--- a/gas/doc/c-aarch64.texi
+++ b/gas/doc/c-aarch64.texi
@@ -235,6 +235,8 @@ automatically cause those extensions to be disabled.
  @tab Enable SME F64F64 Extension.
 @item @code{sme-i16i64} @tab Armv9-A @tab No
  @tab Enable SME I16I64 Extension.
+@item @code{sme2} @tab Armv9-A @tab No
+ @tab Enable SME2.  This implies @code{sme}.
 @item @code{ssbs} @tab ARMv8-A @tab ARMv8.5-A or later
  @tab Enable Speculative Store Bypassing Safe state read and write.
 @item @code{sve} @tab ARMv8.2-A @tab Armv9-A or later
diff --git a/include/opcode/aarch64.h b/include/opcode/aarch64.h
index ef59d531d17..5c9b5e5dac1 100644
--- a/include/opcode/aarch64.h
+++ b/include/opcode/aarch64.h
@@ -100,6 +100,7 @@ typedef uint32_t aarch64_insn;
 #define AARCH64_FEATURE_SME_I16I64   (1ULL << 58) /* SME I16I64.  */
 #define AARCH64_FEATURE_V8_8	     (1ULL << 59) /* Armv8.8 processors.  */
 #define AARCH64_FEATURE_CSSC	     (1ULL << 60) /* Common Short Sequence Compression instructions.  */
+#define AARCH64_FEATURE_SME2	     (1ULL << 61) /* SME2.  */
 
 /* Crypto instructions are the combination of AES and SHA2.  */
 #define AARCH64_FEATURE_CRYPTO	(AARCH64_FEATURE_SHA2 | AARCH64_FEATURE_AES)