diff --git a/src/internal/poll/fd_mutex.go b/src/internal/poll/fd_mutex.go
index 2b76053370..38d4be248d 100644
--- a/src/internal/poll/fd_mutex.go
+++ b/src/internal/poll/fd_mutex.go
@@ -56,7 +56,7 @@ func (mu *fdMutex) incref() bool {
 		}
 		new := old + mutexRef
 		if new&mutexRefMask == 0 {
-			panic("net: inconsistent fdMutex")
+			panic("inconsistent poll.fdMutex")
 		}
 		if atomic.CompareAndSwapUint64(&mu.state, old, new) {
 			return true
@@ -75,7 +75,7 @@ func (mu *fdMutex) increfAndClose() bool {
 		// Mark as closed and acquire a reference.
 		new := (old | mutexClosed) + mutexRef
 		if new&mutexRefMask == 0 {
-			panic("net: inconsistent fdMutex")
+			panic("inconsistent poll.fdMutex")
 		}
 		// Remove all read and write waiters.
 		new &^= mutexRMask | mutexWMask
@@ -101,7 +101,7 @@ func (mu *fdMutex) decref() bool {
 	for {
 		old := atomic.LoadUint64(&mu.state)
 		if old&mutexRefMask == 0 {
-			panic("net: inconsistent fdMutex")
+			panic("inconsistent poll.fdMutex")
 		}
 		new := old - mutexRef
 		if atomic.CompareAndSwapUint64(&mu.state, old, new) {
@@ -136,13 +136,13 @@ func (mu *fdMutex) rwlock(read bool) bool {
 			// Lock is free, acquire it.
 			new = (old | mutexBit) + mutexRef
 			if new&mutexRefMask == 0 {
-				panic("net: inconsistent fdMutex")
+				panic("inconsistent poll.fdMutex")
 			}
 		} else {
 			// Wait for lock.
 			new = old + mutexWait
 			if new&mutexMask == 0 {
-				panic("net: inconsistent fdMutex")
+				panic("inconsistent poll.fdMutex")
 			}
 		}
 		if atomic.CompareAndSwapUint64(&mu.state, old, new) {
@@ -174,7 +174,7 @@ func (mu *fdMutex) rwunlock(read bool) bool {
 	for {
 		old := atomic.LoadUint64(&mu.state)
 		if old&mutexBit == 0 || old&mutexRefMask == 0 {
-			panic("net: inconsistent fdMutex")
+			panic("inconsistent poll.fdMutex")
 		}
 		// Drop lock, drop reference and wake read waiter if present.
 		new := (old &^ mutexBit) - mutexRef
diff --git a/src/internal/poll/fd_windows.go b/src/internal/poll/fd_windows.go
index 8f24bd65e5..a5a1c0c966 100644
--- a/src/internal/poll/fd_windows.go
+++ b/src/internal/poll/fd_windows.go
@@ -203,7 +203,7 @@ func (s *ioSrv) ExecIO(o *operation, name string, submit func(o *operation) erro
 	case ErrClosing, ErrTimeout:
 		// will deal with those.
 	default:
-		panic("net: unexpected runtime.netpoll error: " + netpollErr.Error())
+		panic("unexpected runtime.netpoll error: " + netpollErr.Error())
 	}
 	// Cancel our request.
 	if canCancelIO {