diff --git a/Changes b/Changes
index 0db1fd4a1bd7..cff3fb88c2a4 100644
--- a/Changes
+++ b/Changes
@@ -224,6 +224,10 @@ Working version
 - #11732: Ensure that types from packed modules are always generalised
   (Stephen Dolan and Leo White, review by Jacques Garrigue)
 
+- #11737: Fix segfault condition in Unix.stat under Windows in the presence of
+  multiple threads.
+  (Marc Lasson, Nicolás Ojeda Bär, review by Gabriel Scherer and David Allsopp)
+
 OCaml 5.0
 ---------
 
diff --git a/otherlibs/unix/stat_win32.c b/otherlibs/unix/stat_win32.c
index ac717bc2b31f..197e4340d605 100644
--- a/otherlibs/unix/stat_win32.c
+++ b/otherlibs/unix/stat_win32.c
@@ -339,6 +339,7 @@ static int do_stat(int do_lstat, int use_64, const char* opath, HANDLE fstat, __
 
 CAMLprim value caml_unix_stat(value path)
 {
+  CAMLparam1(path);
   struct _stat64 buf;
   __int64 st_ino;
 
@@ -346,11 +347,12 @@ CAMLprim value caml_unix_stat(value path)
   if (!do_stat(0, 0, String_val(path), NULL, &st_ino, &buf)) {
     caml_uerror("stat", path);
   }
-  return stat_aux(0, st_ino, &buf);
+  CAMLreturn (stat_aux(0, st_ino, &buf));
 }
 
 CAMLprim value caml_unix_stat_64(value path)
 {
+  CAMLparam1(path);
   struct _stat64 buf;
   __int64 st_ino;
 
@@ -358,11 +360,12 @@ CAMLprim value caml_unix_stat_64(value path)
   if (!do_stat(0, 1, String_val(path), NULL, &st_ino, &buf)) {
     caml_uerror("stat", path);
   }
-  return stat_aux(1, st_ino, &buf);
+  CAMLreturn (stat_aux(1, st_ino, &buf));
 }
 
 CAMLprim value caml_unix_lstat(value path)
 {
+  CAMLparam1(path);
   struct _stat64 buf;
   __int64 st_ino;
 
@@ -370,11 +373,12 @@ CAMLprim value caml_unix_lstat(value path)
   if (!do_stat(1, 0, String_val(path), NULL, &st_ino, &buf)) {
     caml_uerror("lstat", path);
   }
-  return stat_aux(0, st_ino, &buf);
+  CAMLreturn (stat_aux(0, st_ino, &buf));
 }
 
 CAMLprim value caml_unix_lstat_64(value path)
 {
+  CAMLparam1(path);
   struct _stat64 buf;
   __int64 st_ino;
 
@@ -382,7 +386,7 @@ CAMLprim value caml_unix_lstat_64(value path)
   if (!do_stat(1, 1, String_val(path), NULL, &st_ino, &buf)) {
     caml_uerror("lstat", path);
   }
-  return stat_aux(1, st_ino, &buf);
+  CAMLreturn (stat_aux(1, st_ino, &buf));
 }
 
 static value do_fstat(value handle, int use_64)