diff --git a/inc/fuse/winfsp_fuse.h b/inc/fuse/winfsp_fuse.h
index 3748b229..6418308b 100644
--- a/inc/fuse/winfsp_fuse.h
+++ b/inc/fuse/winfsp_fuse.h
@@ -178,6 +178,7 @@ struct fuse_flock
         fsp_fuse_daemonize,             \
         fsp_fuse_set_signal_handlers,   \
         0/*conv_to_win_path*/,          \
+        0/*winpid_to_pid*/,             \
         { 0 },                          \
     }
 #else
@@ -188,6 +189,7 @@ struct fuse_flock
         fsp_fuse_daemonize,             \
         fsp_fuse_set_signal_handlers,   \
         0/*conv_to_win_path*/,          \
+        0/*winpid_to_pid*/,             \
         { 0 },                          \
     }
 #endif
@@ -231,6 +233,7 @@ struct fuse_flock
         fsp_fuse_daemonize,             \
         fsp_fuse_set_signal_handlers,   \
         fsp_fuse_conv_to_win_path,      \
+        fsp_fuse_winpid_to_pid,         \
         { 0 },                          \
     }
 
@@ -251,7 +254,8 @@ struct fsp_fuse_env
     int (*daemonize)(int);
     int (*set_signal_handlers)(void *);
     char *(*conv_to_win_path)(const char *);
-    void (*reserved[3])();
+    fuse_pid_t (*winpid_to_pid)(uint32_t);
+    void (*reserved[2])();
 };
 
 FSP_FUSE_API void FSP_FUSE_API_NAME(fsp_fuse_signal_handler)(int sig);
@@ -362,6 +366,13 @@ static inline char *fsp_fuse_conv_to_win_path(const char *path)
         0/*CCP_POSIX_TO_WIN_A*/ | 0x100/*CCP_RELATIVE*/,
         path);
 }
+
+static inline fuse_pid_t fsp_fuse_winpid_to_pid(uint32_t winpid)
+{
+    pid_t cygwin_winpid_to_pid(int winpid);
+    pid_t pid = cygwin_winpid_to_pid(winpid);
+    return -1 != pid ? pid : (fuse_pid_t)winpid;
+}
 #endif
 
 
diff --git a/src/dll/fuse/fuse_intf.c b/src/dll/fuse/fuse_intf.c
index 621f0d5b..acc03835 100644
--- a/src/dll/fuse/fuse_intf.c
+++ b/src/dll/fuse/fuse_intf.c
@@ -167,7 +167,7 @@ NTSTATUS fsp_fuse_op_enter(FSP_FILE_SYSTEM *FileSystem,
     context->private_data = f->data;
     context->uid = Uid;
     context->gid = Gid;
-    context->pid = Pid;
+    context->pid = 0 != f->env->winpid_to_pid ? f->env->winpid_to_pid(Pid) : Pid;
 
     contexthdr = FSP_FUSE_HDR_FROM_CONTEXT(context);
     contexthdr->PosixPath = PosixPath;