diff --git a/src/pkg/runtime/proc.c b/src/pkg/runtime/proc.c
index eec7531e15..438de78b09 100644
--- a/src/pkg/runtime/proc.c
+++ b/src/pkg/runtime/proc.c
@@ -695,6 +695,7 @@ runtime·dropm(void)
 
 	// Undo whatever initialization minit did during needm.
 	runtime·unminit();
+	m->seh = nil;  // reset dangling typed pointer
 
 	// Clear m and g, and return m to the extra list.
 	// After the call to setmg we can only call nosplit functions.