diff --git a/src/if_cscope.c b/src/if_cscope.c
index 0e6f5ae..c027c71 100644
--- a/src/if_cscope.c
+++ b/src/if_cscope.c
@@ -2243,7 +2243,7 @@
 	    waitpid_errno = errno;
 	    if (pid != 0)
 		break;  // break unless the process is still running
-	    mch_delay(50L, FALSE); // sleep 50 ms
+	    mch_delay(50L, 0); // sleep 50 ms
 	}
 # endif
 	/*
@@ -2278,7 +2278,7 @@
 			alive = FALSE; // cscope process no longer exists
 			break;
 		    }
-		    mch_delay(50L, FALSE); // sleep 50ms
+		    mch_delay(50L, 0); // sleep 50 ms
 		}
 	    }
 	    if (alive)