--- a/dom/media/gmp/rlz/GMPDeviceBinding.cpp
+++ b/dom/media/gmp/rlz/GMPDeviceBinding.cpp
@@ -57,17 +57,21 @@ namespace gmp {
 
 #if defined(XP_WIN) && defined(HASH_NODE_ID_WITH_DEVICE_ID)
 MOZ_NEVER_INLINE
 static bool
 GetStackAfterCurrentFrame(uint8_t** aOutTop, uint8_t** aOutBottom)
 {
   // "Top" of the free space on the stack is directly after the memory
   // holding our return address.
+  #ifndef __MINGW32__
   uint8_t* top = (uint8_t*)_AddressOfReturnAddress();
+  #else
+  uint8_t* top = (uint8_t*)__builtin_return_address(0);
+  #endif
 
   // Look down the stack until we find the guard page...
   MEMORY_BASIC_INFORMATION memInfo = {0};
   uint8_t* bottom = top;
   while (1) {
     if (!VirtualQuery(bottom, &memInfo, sizeof(memInfo))) {
       return false;
     }