diff --git a/winsup/cygwin/posix_timer.cc b/winsup/cygwin/posix_timer.cc
index 9d832f201..a336b2bc2 100644
--- a/winsup/cygwin/posix_timer.cc
+++ b/winsup/cygwin/posix_timer.cc
@@ -530,6 +530,7 @@ timer_delete (timer_t timerid)
 	  __leave;
 	}
       delete in_tt;
+      ret = 0;
     }
   __except (EFAULT) {}
   __endtry
diff --git a/winsup/cygwin/release/3.5.5 b/winsup/cygwin/release/3.5.5
index d01f31c60..bcc2c661b 100644
--- a/winsup/cygwin/release/3.5.5
+++ b/winsup/cygwin/release/3.5.5
@@ -10,3 +10,5 @@ Fixes:
 
 - Fix pread() and pwrite() EBADF error after fork().
   Addresses: https://sourceware.org/pipermail/cygwin/2024-September/256468.html
+
+- Fix timer_delete() return value which always indicated failure.