diff --git a/libretro-common/include/memmap.h b/libretro-common/include/memmap.h
index 511caee783..492ace6636 100644
--- a/libretro-common/include/memmap.h
+++ b/libretro-common/include/memmap.h
@@ -38,7 +38,7 @@
 #define MAP_ANONYMOUS MAP_ANON
 #endif
 
-#if !defined(HAVE_MMAN)
+#if !defined(HAVE_MMAN) || defined(_WIN32)
 void* mmap(void *desired_addr, size_t len, int mmap_prot, int mmap_flags, int fildes, size_t off);
 
 void munmap(void *base_addr, size_t len);
diff --git a/libretro-common/memmap/memmap.c b/libretro-common/memmap/memmap.c
index c9540a064b..cfc4974459 100644
--- a/libretro-common/memmap/memmap.c
+++ b/libretro-common/memmap/memmap.c
@@ -46,7 +46,7 @@
 # define DWORD_LO(x) (x)
 #endif
 
-static void *mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset)
+void *mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset)
 {
 	uint32_t flProtect, dwDesiredAccess;
 	off_t end;
@@ -108,13 +108,13 @@ static void *mmap(void *start, size_t length, int prot, int flags, int fd, off_t
 	return ret;
 }
 
-static void munmap(void *addr, size_t length)
+void munmap(void *addr, size_t length)
 {
 	UnmapViewOfFile(addr);
 	/* ruh-ro, we leaked handle from CreateFileMapping() ... */
 }
 
-static int mprotect(void *addr, size_t len, int prot)
+int mprotect(void *addr, size_t len, int prot)
 {
    /* Incomplete, just assumes PAGE_EXECUTE_READWRITE right now
     * instead of correctly handling prot */