diff --git a/.gitattributes b/.gitattributes
index 9b99d3c03c..df7276c0fd 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -13156,6 +13156,7 @@ tests/webtbs/tw23503.pp svneol=native#text/pascal
 tests/webtbs/tw2351.pp svneol=native#text/plain
 tests/webtbs/tw23568.pp -text svneol=native#text/plain
 tests/webtbs/tw2363.pp svneol=native#text/plain
+tests/webtbs/tw23725.pp svneol=native#text/pascal
 tests/webtbs/tw23744.pp svneol=native#text/plain
 tests/webtbs/tw2377.pp svneol=native#text/plain
 tests/webtbs/tw2378.pp svneol=native#text/plain
diff --git a/rtl/nativent/sysfile.inc b/rtl/nativent/sysfile.inc
index d937cbe94f..ca41026e4a 100644
--- a/rtl/nativent/sysfile.inc
+++ b/rtl/nativent/sysfile.inc
@@ -329,7 +329,7 @@ begin
   if ((filemode and fmshareExclusive) = fmshareExclusive) then
     { no sharing }
   else
-    if (filemode = fmShareCompat) or ((filemode and fmshareDenyWrite) = fmshareDenyWrite) then
+    if ((filemode and $F0) = fmShareCompat) or ((filemode and fmshareDenyWrite) = fmshareDenyWrite) then
       shflags := FILE_SHARE_READ
   else
     if ((filemode and fmshareDenyRead) = fmshareDenyRead) then
diff --git a/rtl/win/sysfile.inc b/rtl/win/sysfile.inc
index 96f569a778..9aa4f16a0e 100644
--- a/rtl/win/sysfile.inc
+++ b/rtl/win/sysfile.inc
@@ -230,7 +230,7 @@ begin
   if ((filemode and fmshareExclusive) = fmshareExclusive) then
     { no sharing }
   else
-    if (filemode = fmShareCompat) or ((filemode and fmshareDenyWrite) = fmshareDenyWrite) then
+    if ((filemode and $f0) = fmShareCompat) or ((filemode and fmshareDenyWrite) = fmshareDenyWrite) then
       shflags := file_Share_Read
   else
     if ((filemode and fmshareDenyRead) = fmshareDenyRead) then
diff --git a/tests/webtbs/tw23725.pp b/tests/webtbs/tw23725.pp
new file mode 100644
index 0000000000..702936b385
--- /dev/null
+++ b/tests/webtbs/tw23725.pp
@@ -0,0 +1,13 @@
+var
+  t,t1, t2: text;
+  s: string;
+begin
+  assign(t,'tw23725.txt');
+  rewrite(t);
+  writeln(t);
+  close(t);
+  assign(t1, 'tw23725.txt'); assign(t2, 'tw23725.txt');
+  write('Opening 1... '); reset(t1); writeln('done.');
+  write('Opening 2... '); reset(t2); writeln('done.');
+  close(t2); close(t1);
+end.