diff --git a/src/system.c b/src/system.c
index 9ae26c2..7dc1e96 100644
--- a/src/system.c
+++ b/src/system.c
@@ -1648,6 +1648,12 @@ BOOL mock_FindClose(HANDLE hFindFile)
     return TRUE;
 }
 
+BOOL mock_MoveFileExW(WCHAR *lpExistingFileName, WCHAR *lpNewFileName, DWORD dwFlags)
+{
+    // Forward to real MoveFileExW, last error is set by the real call
+    return MoveFileExW(lpExistingFileName, lpNewFileName, dwFlags);
+}
+
 #else
 
 int mock_clock_gettime(clockid_t clockid, struct timespec *tp)
diff --git a/src/system.h b/src/system.h
index 31ba995..47488f1 100644
--- a/src/system.h
+++ b/src/system.h
@@ -73,6 +73,7 @@ int      mock__mkdir(char *path);
 HANDLE   mock_FindFirstFileA(char *lpFileName, WIN32_FIND_DATAA *lpFindFileData);
 BOOL     mock_FindNextFileA(HANDLE hFindFile, WIN32_FIND_DATAA *lpFindFileData);
 BOOL     mock_FindClose(HANDLE hFindFile);
+BOOL     mock_MoveFileExW(WCHAR *lpExistingFileName, WCHAR *lpNewFileName, DWORD dwFlags);
 #else
 int     mock_clock_gettime(clockid_t clockid, struct timespec *tp);
 int     mock_open(char *path, int flags, int mode);
@@ -124,6 +125,7 @@ int     mock_closedir(DIR *dirp);
 #define sys_FindFirstFileA   mock_FindFirstFileA
 #define sys_FindNextFileA    mock_FindNextFileA
 #define sys_FindClose        mock_FindClose
+#define sys_MoveFileExW      mock_MoveFileExW
 
 // Linux
 #define sys_mkdir            mock_mkdir
@@ -178,6 +180,7 @@ int     mock_closedir(DIR *dirp);
 #define sys_FindFirstFileA   FindFirstFileA
 #define sys_FindNextFileA    FindNextFileA
 #define sys_FindClose        FindClose
+#define sys_MoveFileExW      MoveFileExW
 
 // Linux
 #define sys_mkdir            mkdir