diff --git a/src/pkg/runtime/signal_darwin_386.c b/src/pkg/runtime/signal_darwin_386.c
index 803bd242f30..1844f68a634 100644
--- a/src/pkg/runtime/signal_darwin_386.c
+++ b/src/pkg/runtime/signal_darwin_386.c
@@ -92,9 +92,7 @@ runtime·sighandler(int32 sig, Siginfo *info, void *context, G *gp)
 		return;
 
 Throw:
-	if(runtime·panicking)	// traceback already printed
-		runtime·exit(2);
-	runtime·panicking = 1;
+	runtime·startpanic();
 
 	if(sig < 0 || sig >= NSIG){
 		runtime·printf("Signal %d\n", sig);
diff --git a/src/pkg/runtime/signal_darwin_amd64.c b/src/pkg/runtime/signal_darwin_amd64.c
index 0c954294a58..32c73081c11 100644
--- a/src/pkg/runtime/signal_darwin_amd64.c
+++ b/src/pkg/runtime/signal_darwin_amd64.c
@@ -102,9 +102,7 @@ runtime·sighandler(int32 sig, Siginfo *info, void *context, G *gp)
 		return;
 
 Throw:
-	if(runtime·panicking)	// traceback already printed
-		runtime·exit(2);
-	runtime·panicking = 1;
+	runtime·startpanic();
 
 	if(sig < 0 || sig >= NSIG){
 		runtime·printf("Signal %d\n", sig);
diff --git a/src/pkg/runtime/signal_freebsd_386.c b/src/pkg/runtime/signal_freebsd_386.c
index b07ead62e8d..80da95d98ac 100644
--- a/src/pkg/runtime/signal_freebsd_386.c
+++ b/src/pkg/runtime/signal_freebsd_386.c
@@ -89,9 +89,7 @@ runtime·sighandler(int32 sig, Siginfo *info, void *context, G *gp)
 		return;
 
 Throw:
-	if(runtime·panicking)	// traceback already printed
-		runtime·exit(2);
-	runtime·panicking = 1;
+	runtime·startpanic();
 
 	if(sig < 0 || sig >= NSIG)
 		runtime·printf("Signal %d\n", sig);
diff --git a/src/pkg/runtime/signal_freebsd_amd64.c b/src/pkg/runtime/signal_freebsd_amd64.c
index 2a686096818..e4307682f4c 100644
--- a/src/pkg/runtime/signal_freebsd_amd64.c
+++ b/src/pkg/runtime/signal_freebsd_amd64.c
@@ -97,9 +97,7 @@ runtime·sighandler(int32 sig, Siginfo *info, void *context, G *gp)
 		return;
 
 Throw:
-	if(runtime·panicking)	// traceback already printed
-		runtime·exit(2);
-	runtime·panicking = 1;
+	runtime·startpanic();
 
 	if(sig < 0 || sig >= NSIG)
 		runtime·printf("Signal %d\n", sig);
diff --git a/src/pkg/runtime/signal_linux_386.c b/src/pkg/runtime/signal_linux_386.c
index b43dbc1121c..b154ad88725 100644
--- a/src/pkg/runtime/signal_linux_386.c
+++ b/src/pkg/runtime/signal_linux_386.c
@@ -85,9 +85,7 @@ runtime·sighandler(int32 sig, Siginfo *info, void *context, G *gp)
 		return;
 
 Throw:
-	if(runtime·panicking)	// traceback already printed
-		runtime·exit(2);
-	runtime·panicking = 1;
+	runtime·startpanic();
 
 	if(sig < 0 || sig >= NSIG)
 		runtime·printf("Signal %d\n", sig);
diff --git a/src/pkg/runtime/signal_linux_amd64.c b/src/pkg/runtime/signal_linux_amd64.c
index 551744b78d5..14095ba61cd 100644
--- a/src/pkg/runtime/signal_linux_amd64.c
+++ b/src/pkg/runtime/signal_linux_amd64.c
@@ -95,9 +95,7 @@ runtime·sighandler(int32 sig, Siginfo *info, void *context, G *gp)
 		return;
 
 Throw:
-	if(runtime·panicking)	// traceback already printed
-		runtime·exit(2);
-	runtime·panicking = 1;
+	runtime·startpanic();
 
 	if(sig < 0 || sig >= NSIG)
 		runtime·printf("Signal %d\n", sig);
diff --git a/src/pkg/runtime/signal_netbsd_386.c b/src/pkg/runtime/signal_netbsd_386.c
index 739b359ee61..39d829484de 100644
--- a/src/pkg/runtime/signal_netbsd_386.c
+++ b/src/pkg/runtime/signal_netbsd_386.c
@@ -85,9 +85,7 @@ runtime·sighandler(int32 sig, Siginfo *info, void *context, G *gp)
 		return;
 
 Throw:
-	if(runtime·panicking)	// traceback already printed
-		runtime·exit(2);
-	runtime·panicking = 1;
+	runtime·startpanic();
 
 	if(sig < 0 || sig >= NSIG)
 		runtime·printf("Signal %d\n", sig);
diff --git a/src/pkg/runtime/signal_netbsd_amd64.c b/src/pkg/runtime/signal_netbsd_amd64.c
index e71f23551da..8b4f624e7cb 100644
--- a/src/pkg/runtime/signal_netbsd_amd64.c
+++ b/src/pkg/runtime/signal_netbsd_amd64.c
@@ -94,9 +94,7 @@ runtime·sighandler(int32 sig, Siginfo *info, void *context, G *gp)
 		return;
 
 Throw:
-	if(runtime·panicking)	// traceback already printed
-		runtime·exit(2);
-	runtime·panicking = 1;
+	runtime·startpanic();
 
 	if(sig < 0 || sig >= NSIG)
 		runtime·printf("Signal %d\n", sig);
diff --git a/src/pkg/runtime/signal_openbsd_386.c b/src/pkg/runtime/signal_openbsd_386.c
index 739b359ee61..39d829484de 100644
--- a/src/pkg/runtime/signal_openbsd_386.c
+++ b/src/pkg/runtime/signal_openbsd_386.c
@@ -85,9 +85,7 @@ runtime·sighandler(int32 sig, Siginfo *info, void *context, G *gp)
 		return;
 
 Throw:
-	if(runtime·panicking)	// traceback already printed
-		runtime·exit(2);
-	runtime·panicking = 1;
+	runtime·startpanic();
 
 	if(sig < 0 || sig >= NSIG)
 		runtime·printf("Signal %d\n", sig);
diff --git a/src/pkg/runtime/signal_openbsd_amd64.c b/src/pkg/runtime/signal_openbsd_amd64.c
index e71f23551da..8b4f624e7cb 100644
--- a/src/pkg/runtime/signal_openbsd_amd64.c
+++ b/src/pkg/runtime/signal_openbsd_amd64.c
@@ -94,9 +94,7 @@ runtime·sighandler(int32 sig, Siginfo *info, void *context, G *gp)
 		return;
 
 Throw:
-	if(runtime·panicking)	// traceback already printed
-		runtime·exit(2);
-	runtime·panicking = 1;
+	runtime·startpanic();
 
 	if(sig < 0 || sig >= NSIG)
 		runtime·printf("Signal %d\n", sig);