diff --git a/dlls/msvcrt/tests/printf.c b/dlls/msvcrt/tests/printf.c
index 90f95fc5ce1..da4010e90bb 100644
--- a/dlls/msvcrt/tests/printf.c
+++ b/dlls/msvcrt/tests/printf.c
@@ -131,6 +131,16 @@ static void test_sprintf( void )
     ok(!strcmp(buffer,"-s"), "failed\n");
     ok( r==2, "return count wrong\n");
 
+    format = "%ls";
+    r = sprintf(buffer, format, wide );
+    ok(!strcmp(buffer,"wide"), "failed\n");
+    ok( r==4, "return count wrong\n");
+
+    format = "%Ls";
+    r = sprintf(buffer, format, "not wide" );
+    ok(!strcmp(buffer,"not wide"), "failed\n");
+    ok( r==8, "return count wrong\n");
+
     format = "%b";
     r = sprintf(buffer, format);
     ok(!strcmp(buffer,"b"), "failed\n");
diff --git a/dlls/msvcrt/wcs.c b/dlls/msvcrt/wcs.c
index 66d782f034a..4caf5a7c448 100644
--- a/dlls/msvcrt/wcs.c
+++ b/dlls/msvcrt/wcs.c
@@ -501,7 +501,7 @@ static int pf_vsnprintf( pf_output *out, const WCHAR *format, va_list valist )
         r = 0;
 
         /* output a unicode string */
-        if( ( flags.Format == 's' && flags.WideString ) ||
+        if( ( flags.Format == 's' && (flags.WideString || flags.IntegerLength == 'l' )) ||
             ( !out->unicode && flags.Format == 'S' ) ||
             ( out->unicode && flags.Format == 's' ) )
         {