diff --git a/mingw-w64-crt/lib32/kernel32.def b/mingw-w64-crt/lib32/kernel32.def
index 0435d8d69..65a40c57e 100644
--- a/mingw-w64-crt/lib32/kernel32.def
+++ b/mingw-w64-crt/lib32/kernel32.def
@@ -226,6 +226,7 @@ DeleteFileTransactedA@8
 DeleteFileTransactedW@8
 DeleteFileW@4
 DeleteProcThreadAttributeList@4
+DeleteSynchronizationBarrier@4
 DeleteTimerQueue@4
 DeleteTimerQueueEx@8
 DeleteTimerQueueTimer@12
@@ -248,6 +249,7 @@ EncodeSystemPointer@4
 EndUpdateResourceA@8
 EndUpdateResourceW@8
 EnterCriticalSection@4
+EnterSynchronizationBarrier@8
 EnumCalendarInfoA@16
 EnumCalendarInfoExA@16
 EnumCalendarInfoExEx@24
@@ -762,6 +764,7 @@ InitializeCriticalSectionEx@12
 InitializeProcThreadAttributeList@16
 InitializeSListHead@4
 InitializeSRWLock@4
+InitializeSynchronizationBarrier@12
 InterlockedCompareExchange64@20 DATA ; FIXME: this is for Vista+. forwards to NTDLL.RtlInterlockedCompareExchange64@20
 InterlockedCompareExchange@12 DATA
 InterlockedDecrement@4 DATA
diff --git a/mingw-w64-crt/lib64/kernel32.def b/mingw-w64-crt/lib64/kernel32.def
index ef659056a..0bbfe33f2 100644
--- a/mingw-w64-crt/lib64/kernel32.def
+++ b/mingw-w64-crt/lib64/kernel32.def
@@ -229,6 +229,7 @@ DeleteFileTransactedA
 DeleteFileTransactedW
 DeleteFileW
 DeleteProcThreadAttributeList
+DeleteSynchronizationBarrier
 DeleteTimerQueue
 DeleteTimerQueueEx
 DeleteTimerQueueTimer
@@ -256,6 +257,7 @@ EncodeSystemPointer
 EndUpdateResourceA
 EndUpdateResourceW
 EnterCriticalSection
+EnterSynchronizationBarrier
 EnterUmsSchedulingMode
 EnumCalendarInfoA
 EnumCalendarInfoExA
@@ -777,6 +779,7 @@ InitializeExtendedContext
 InitializeProcThreadAttributeList
 InitializeSListHead
 InitializeSRWLock
+InitializeSynchronizationBarrier
 InterlockedFlushSList
 InterlockedPopEntrySList
 InterlockedPushEntrySList
diff --git a/mingw-w64-headers/include/synchapi.h b/mingw-w64-headers/include/synchapi.h
index d9a94eda0..e8e73e1ba 100755
--- a/mingw-w64-headers/include/synchapi.h
+++ b/mingw-w64-headers/include/synchapi.h
@@ -121,9 +121,6 @@ extern "C" {
   WINBASEAPI WINBOOL WINAPI SetWaitableTimer (HANDLE hTimer, const LARGE_INTEGER *lpDueTime, LONG lPeriod, PTIMERAPCROUTINE pfnCompletionRoutine, LPVOID lpArgToCompletionRoutine, WINBOOL fResume);
   WINBASEAPI WINBOOL WINAPI CancelWaitableTimer (HANDLE hTimer);
   WINBASEAPI HANDLE WINAPI OpenWaitableTimerW (DWORD dwDesiredAccess, WINBOOL bInheritHandle, LPCWSTR lpTimerName);
-  WINBOOL WINAPI EnterSynchronizationBarrier (LPSYNCHRONIZATION_BARRIER lpBarrier, DWORD dwFlags);
-  WINBOOL WINAPI InitializeSynchronizationBarrier (LPSYNCHRONIZATION_BARRIER lpBarrier, LONG lTotalThreads, LONG lSpinCount);
-  WINBOOL WINAPI DeleteSynchronizationBarrier (LPSYNCHRONIZATION_BARRIER lpBarrier);
   WINBASEAPI VOID WINAPI Sleep (DWORD dwMilliseconds);
   WINBASEAPI DWORD WINAPI SignalObjectAndWait (HANDLE hObjectToSignal, HANDLE hObjectToWaitOn, DWORD dwMilliseconds, WINBOOL bAlertable);
 #if _WIN32_WINNT >= 0x0600
@@ -139,6 +136,12 @@ extern "C" {
   WINBOOL WINAPI SetWaitableTimerEx (HANDLE hTimer, const LARGE_INTEGER *lpDueTime, LONG lPeriod, PTIMERAPCROUTINE pfnCompletionRoutine, LPVOID lpArgToCompletionRoutine, PREASON_CONTEXT WakeContext, ULONG TolerableDelay);
 #endif
 
+#if _WIN32_WINNT >= 0x0602
+  WINBASEAPI WINBOOL WINAPI EnterSynchronizationBarrier (LPSYNCHRONIZATION_BARRIER lpBarrier, DWORD dwFlags);
+  WINBASEAPI WINBOOL WINAPI InitializeSynchronizationBarrier (LPSYNCHRONIZATION_BARRIER lpBarrier, LONG lTotalThreads, LONG lSpinCount);
+  WINBASEAPI WINBOOL WINAPI DeleteSynchronizationBarrier (LPSYNCHRONIZATION_BARRIER lpBarrier);
+#endif
+
 #define CreateMutex __MINGW_NAME_AW(CreateMutex)
 #define CreateEvent __MINGW_NAME_AW(CreateEvent)