diff --git a/src/win/winapi.c b/src/win/winapi.c
index ff6912d0..a474c92a 100644
--- a/src/win/winapi.c
+++ b/src/win/winapi.c
@@ -33,6 +33,7 @@ sNtSetInformationFile pNtSetInformationFile;
 sGetQueuedCompletionStatusEx pGetQueuedCompletionStatusEx;
 sSetFileCompletionNotificationModes pSetFileCompletionNotificationModes;
 sCreateSymbolicLinkW pCreateSymbolicLinkW;
+sCancelIoEx pCancelIoEx;
 sInitializeSRWLock pInitializeSRWLock;
 sAcquireSRWLockShared pAcquireSRWLockShared;
 sAcquireSRWLockExclusive pAcquireSRWLockExclusive;
@@ -94,6 +95,9 @@ void uv_winapi_init() {
   pCreateSymbolicLinkW = (sCreateSymbolicLinkW)
     GetProcAddress(kernel32_module, "CreateSymbolicLinkW");
 
+  pCancelIoEx = (sCancelIoEx)
+    GetProcAddress(kernel32_module, "CancelIoEx");
+
   pInitializeSRWLock = (sInitializeSRWLock)
     GetProcAddress(kernel32_module, "InitializeSRWLock");
 
diff --git a/src/win/winapi.h b/src/win/winapi.h
index b79ff4c2..4b1a249f 100644
--- a/src/win/winapi.h
+++ b/src/win/winapi.h
@@ -4378,6 +4378,10 @@ typedef BOOLEAN (WINAPI* sCreateSymbolicLinkW)
                  LPCWSTR lpTargetFileName,
                  DWORD dwFlags);
 
+typedef BOOL (WINAPI* sCancelIoEx)
+             (HANDLE hFile,
+              LPOVERLAPPED lpOverlapped);
+
 typedef VOID (WINAPI* sInitializeSRWLock)
              (PSRWLOCK SRWLock);
 
@@ -4412,6 +4416,7 @@ extern sNtSetInformationFile pNtSetInformationFile;
 extern sGetQueuedCompletionStatusEx pGetQueuedCompletionStatusEx;
 extern sSetFileCompletionNotificationModes pSetFileCompletionNotificationModes;
 extern sCreateSymbolicLinkW pCreateSymbolicLinkW;
+extern sCancelIoEx pCancelIoEx;
 extern sInitializeSRWLock pInitializeSRWLock;
 extern sAcquireSRWLockShared pAcquireSRWLockShared;
 extern sAcquireSRWLockExclusive pAcquireSRWLockExclusive;