diff --git a/src/os_win32.c b/src/os_win32.c
index 60c0463..21b9b01 100644
--- a/src/os_win32.c
+++ b/src/os_win32.c
@@ -1588,26 +1588,14 @@
 	{
 	    DWORD dwWaitTime = dwEndTime - dwNow;
 
-# ifdef FEAT_JOB_CHANNEL
-	    // Check channel while waiting for input.
-	    if (dwWaitTime > 100)
-	    {
-		dwWaitTime = 100;
-		// If there is readahead then parse_queued_messages() timed out
-		// and we should call it again soon.
-		if (channel_any_readahead())
-		    dwWaitTime = 10;
-	    }
-# endif
-# ifdef FEAT_BEVAL_GUI
-	    if (p_beval && dwWaitTime > 100)
-		// The 'balloonexpr' may indirectly invoke a callback while
-		// waiting for a character, need to check often.
-		dwWaitTime = 100;
-# endif
+	    // Don't wait for more than 11 msec to avoid dropping characters,
+	    // check channel while waiting for input and handle a callback from
+	    // 'balloonexpr'.
+	    if (dwWaitTime > 11)
+		dwWaitTime = 11;
+
 # ifdef FEAT_MZSCHEME
-	    if (mzthreads_allowed() && p_mzq > 0
-				    && (msec < 0 || (long)dwWaitTime > p_mzq))
+	    if (mzthreads_allowed() && p_mzq > 0 && (long)dwWaitTime > p_mzq)
 		dwWaitTime = p_mzq; // don't wait longer than 'mzquantum'
 # endif
 # ifdef FEAT_TIMERS