diff -urN ../exim-4.91.orig/src/daemon.c ./src/daemon.c
--- ../exim-4.91.orig/src/daemon.c	2018-04-15 02:18:10.000000000 +0300
+++ ./src/daemon.c	2018-05-01 19:27:35.338798000 +0300
@@ -558,7 +558,8 @@
     the next message is received. */
 
     #ifndef SIG_IGN_WORKS
-    while (waitpid(-1, NULL, WNOHANG) > 0);
+    while (waitpid(-1, NULL, WNOHANG) > 0)
+        ;
     #endif
 
     /* Reclaim up the store used in accepting this message */