diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE
index bcb526c85b91444cee253e5496b0ae748250f816..eeff61d82f8fec10c08f4f8f0bca25ca670ed5e0 100644
--- a/gcc/go/gofrontend/MERGE
+++ b/gcc/go/gofrontend/MERGE
@@ -1,4 +1,4 @@
-62fc90f52da2f52cbe3b4f10e560dc6aa59baeb5
+8336fe4a5da68d9188dfbc4fb647ccbbe4d60ba4
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
diff --git a/libgo/go/runtime/signal_gccgo.go b/libgo/go/runtime/signal_gccgo.go
index 2eece687e35bebb95b454c66ee60213bae0a7a73..82e6996ab7e30b7de9dbe1e346a1aec9da41643a 100644
--- a/libgo/go/runtime/signal_gccgo.go
+++ b/libgo/go/runtime/signal_gccgo.go
@@ -106,7 +106,8 @@ func getsig(i uint32) uintptr {
 	if sigaction(i, nil, &sa) < 0 {
 		// On GNU/Linux glibc rejects attempts to call
 		// sigaction with signal 32 (SIGCANCEL) or 33 (SIGSETXID).
-		if GOOS == "linux" && (i == 32 || i == 33) {
+		// On musl signal 34 (SIGSYNCCALL) also needs to be treated accordingly.
+		if GOOS == "linux" && (i == 32 || i == 33 || i == 34) {
 			return _SIG_DFL
 		}
 		throw("sigaction read failure")
diff --git a/libgo/mksigtab.sh b/libgo/mksigtab.sh
index 11e4ec436bd893202ebca4c685d41b9ea50b1ce8..cdf6fcd823fbc8a3cf33c3d2d21bebdc580ec513 100644
--- a/libgo/mksigtab.sh
+++ b/libgo/mksigtab.sh
@@ -95,10 +95,12 @@ checksig _SIGLOST '   {_SigNotify, "SIGLOST: resource lost (Sun); server died (G
 
 # Special handling of signals 32 and 33 on GNU/Linux systems,
 # because they are special to glibc.
+# Signal 34 is additionally special to Linux systems with musl.
 if test "${GOOS}" = "linux"; then
-    SIGLIST=$SIGLIST"_32__33_"
+    SIGLIST=$SIGLIST"_32__33__34_"
     echo '	32: {_SigSetStack + _SigUnblock, "signal 32"}, /* SIGCANCEL; see issue 6997 */'
     echo '	33: {_SigSetStack + _SigUnblock, "signal 33"}, /* SIGSETXID; see issues 3871, 9400, 12498 */'
+    echo '	34: {_SigSetStack + _SigUnblock, "signal 34"}, /* musl SIGSYNCCALL; see issue 39343 */'
 fi
 
 if test "${GOOS}" = "aix"; then