diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE
index 524aca72fd75..06a8731d06fc 100644
--- a/gcc/go/gofrontend/MERGE
+++ b/gcc/go/gofrontend/MERGE
@@ -1,4 +1,4 @@
-2ae6bf76f97f7d4c63a1f0ad0683b9ba62baaf06
+21775ae119830810d9e415a02e85349f4190c68c
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
diff --git a/libgo/sysinfo.c b/libgo/sysinfo.c
index 1ba27b1a0936..884d01716b84 100644
--- a/libgo/sysinfo.c
+++ b/libgo/sysinfo.c
@@ -106,9 +106,13 @@
 /* Avoid https://sourceware.org/bugzilla/show_bug.cgi?id=762 .  */
 #define ia64_fpreg pt_ia64_fpreg
 #define pt_all_user_regs pt_ia64_all_user_regs
+/* Avoid redefinition of ptrace_peeksiginfo from <sys/ptrace.h>.
+   https://gcc.gnu.org/PR81324 .  */
+#define ptrace_peeksiginfo_args ignore_ptrace_peeksiginfo_args
 #include <linux/ptrace.h>
 #undef ia64_fpreg
 #undef pt_all_user_regs
+#undef ptrace_peeksiginfo_args
 #endif
 #if defined(HAVE_LINUX_RTNETLINK_H)
 #include <linux/rtnetlink.h>