diff --git a/lib/std/Progress.zig b/lib/std/Progress.zig
index b75ad106a43521459b9263f1b4d9368dfa05244c..131aff2d2b713569e943b30f058efdf45406b49a 100644
--- a/lib/std/Progress.zig
+++ b/lib/std/Progress.zig
@@ -103,8 +103,10 @@ pub const Node = struct {
             }
             parent.completeOne();
         } else {
+            const held = self.context.update_lock.acquire();
+            defer held.release();
             self.context.done = true;
-            self.context.refresh();
+            self.context.refreshWithHeldLock();
         }
     }
 
diff --git a/lib/std/os/windows/kernel32.zig b/lib/std/os/windows/kernel32.zig
index ec4a75afa9a0b2f570df2fafab7c0e8954f136f5..734059a08ace2dbee6a3d9a0ed40f7aa524838f5 100644
--- a/lib/std/os/windows/kernel32.zig
+++ b/lib/std/os/windows/kernel32.zig
@@ -299,6 +299,6 @@ pub extern "kernel32" fn SleepConditionVariableSRW(
     f: ULONG,
 ) callconv(WINAPI) BOOL;
 
-pub extern "kernel32" fn TryAcquireSRWLockExclusive(s: *SRWLOCK) callconv(WINAPI) BOOL;
+pub extern "kernel32" fn TryAcquireSRWLockExclusive(s: *SRWLOCK) callconv(WINAPI) BOOLEAN;
 pub extern "kernel32" fn AcquireSRWLockExclusive(s: *SRWLOCK) callconv(WINAPI) void;
 pub extern "kernel32" fn ReleaseSRWLockExclusive(s: *SRWLOCK) callconv(WINAPI) void;