diff --git a/libc/platform/bionic/mte_kernel.h b/libc/platform/bionic/mte_kernel.h
index d22d65e..e8ef2a5 100644
--- a/libc/platform/bionic/mte_kernel.h
+++ b/libc/platform/bionic/mte_kernel.h
@@ -51,6 +51,7 @@
 #define SEGV_MTEAERR 8
 #define SEGV_MTESERR 9
 
-#define PTRACE_PEEKTAG 33
+#define PTRACE_PEEKMTETAGS 33
+#define PTRACE_POKEMTETAGS 34
 
 #endif