--- a/mozglue/misc/WindowsMapRemoteView.cpp
+++ b/mozglue/misc/WindowsMapRemoteView.cpp
@@ -10,22 +10,22 @@
 #include "mozilla/DynamicallyLinkedFunctionPtr.h"
 
 #include <winternl.h>
 
 #if (NTDDI_VERSION < NTDDI_WIN10_RS2)
 
 // MapViewOfFile2 is just an inline function that calls MapViewOfFileNuma2 with
 // its preferred node set to NUMA_NO_PREFERRED_NODE
-PVOID WINAPI
+WINBASEAPI PVOID WINAPI
 MapViewOfFileNuma2(HANDLE aFileMapping, HANDLE aProcess, ULONG64 aOffset,
                    PVOID aBaseAddress, SIZE_T aViewSize, ULONG aAllocationType,
                    ULONG aPageProtection, ULONG aPreferredNode);
 
-BOOL WINAPI
+WINBASEAPI BOOL WINAPI
 UnmapViewOfFile2(HANDLE aProcess, PVOID aBaseAddress, ULONG aUnmapFlags);
 
 #endif // (NTDDI_VERSION < NTDDI_WIN10_RS2)
 
 enum SECTION_INHERIT
 {
   ViewShare = 1,
   ViewUnmap = 2