diff --git a/lld/ELF/EhFrame.cpp b/lld/ELF/EhFrame.cpp
--- a/lld/ELF/EhFrame.cpp
+++ b/lld/ELF/EhFrame.cpp
@@ -171,7 +171,7 @@
       readByte();
     else if (c == 'P')
       skipAugP();
-    else if (c != 'B' && c != 'S')
+    else if (c != 'B' && c != 'S' && c != 'G')
       failOn(aug.data(), "unknown .eh_frame augmentation string: " + aug);
   }
   return DW_EH_PE_absptr;
@@ -188,7 +188,7 @@
       skipAugP();
     else if (c == 'R')
       readByte();
-    else if (c != 'B' && c != 'S')
+    else if (c != 'B' && c != 'S' && c != 'G')
       failOn(aug.data(), "unknown .eh_frame augmentation string: " + aug);
   }
   return false;
diff --git a/lld/test/ELF/stack-tagging-cfi.s b/lld/test/ELF/stack-tagging-cfi.s
new file mode 100644
--- /dev/null
+++ b/lld/test/ELF/stack-tagging-cfi.s
@@ -0,0 +1,19 @@
+# REQUIRES: aarch64
+
+# RUN: llvm-mc -filetype=obj -triple aarch64 -mattr=+mte %s -o %t.o
+# RUN: ld.lld --eh-frame-hdr %t.o -o %t
+# RUN: llvm-objdump --dwarf=frames %t | FileCheck %s
+
+# CHECK: Augmentation:          "zRG"
+
+	.text
+	.globl	WithUnwind
+	.p2align	2
+	.type	WithUnwind,@function
+WithUnwind:
+	.cfi_startproc
+	.cfi_mte_tagged_frame
+	ret
+.Lfunc_end0:
+	.size	WithUnwind, .Lfunc_end0-WithUnwind
+	.cfi_endproc