diff --git a/lib/std/Progress.zig b/lib/std/Progress.zig
index c912b60f57..059f6e73a7 100644
--- a/lib/std/Progress.zig
+++ b/lib/std/Progress.zig
@@ -234,7 +234,7 @@ fn refreshWithHeldLock(self: *Progress) void {
             self.terminal = null;
             break :winapi;
         }
-        if (windows.kernel32.FillConsoleOutputCharacterA(
+        if (windows.kernel32.FillConsoleOutputCharacterW(
             file.handle,
             ' ',
             fill_chars,
diff --git a/lib/std/os/windows/kernel32.zig b/lib/std/os/windows/kernel32.zig
index e50301f799..8f100a9511 100644
--- a/lib/std/os/windows/kernel32.zig
+++ b/lib/std/os/windows/kernel32.zig
@@ -90,6 +90,7 @@ pub extern "kernel32" fn GetConsoleMode(in_hConsoleHandle: HANDLE, out_lpMode: *
 
 pub extern "kernel32" fn GetConsoleScreenBufferInfo(hConsoleOutput: HANDLE, lpConsoleScreenBufferInfo: *CONSOLE_SCREEN_BUFFER_INFO) callconv(WINAPI) BOOL;
 pub extern "kernel32" fn FillConsoleOutputCharacterA(hConsoleOutput: HANDLE, cCharacter: CHAR, nLength: DWORD, dwWriteCoord: COORD, lpNumberOfCharsWritten: LPDWORD) callconv(WINAPI) BOOL;
+pub extern "kernel32" fn FillConsoleOutputCharacterW(hConsoleOutput: HANDLE, cCharacter: WCHAR, nLength: DWORD, dwWriteCoord: COORD, lpNumberOfCharsWritten: LPDWORD) callconv(WINAPI) BOOL;
 pub extern "kernel32" fn FillConsoleOutputAttribute(hConsoleOutput: HANDLE, wAttribute: WORD, nLength: DWORD, dwWriteCoord: COORD, lpNumberOfAttrsWritten: LPDWORD) callconv(WINAPI) BOOL;
 pub extern "kernel32" fn SetConsoleCursorPosition(hConsoleOutput: HANDLE, dwCursorPosition: COORD) callconv(WINAPI) BOOL;