diff -ur syslog-ng-syslog-ng-3.27.1/lib/logsource.c syslog-ng-syslog-ng-3.27.1.32bit/lib/logsource.c
--- syslog-ng-syslog-ng-3.27.1/lib/logsource.c	2020-04-30 16:18:56.000000000 +0200
+++ syslog-ng-syslog-ng-3.27.1.32bit/lib/logsource.c	2020-05-09 11:36:21.539723717 +0200
@@ -57,7 +58,7 @@
       return window_size_increment;
     }
 
-  guint32 remaining_window_size_increment = MAX(window_size_increment - old, 0);
+  guint32 remaining_window_size_increment = MAX((gssize)window_size_increment - old, 0);
   guint32 reclaimed = window_size_increment - remaining_window_size_increment;
   atomic_gssize_add(&self->pending_reclaimed, reclaimed);
 
diff -ur syslog-ng-syslog-ng-3.27.1/lib/tests/test_window_size_counter.c syslog-ng-syslog-ng-3.27.1.32bit/lib/tests/test_window_size_counter.c
--- syslog-ng-syslog-ng-3.27.1/lib/tests/test_window_size_counter.c	2020-04-30 16:18:56.000000000 +0200
+++ syslog-ng-syslog-ng-3.27.1.32bit/lib/tests/test_window_size_counter.c	2020-05-09 11:43:12.103043082 +0200
@@ -59,8 +59,8 @@
   WindowSizeCounter c;
   gboolean suspended = FALSE;
   window_size_counter_set(&c, -1);
-  gint v = (gint)window_size_counter_get(&c, &suspended);
-  cr_assert_eq(v, -1);
+  gssize v = (gssize)window_size_counter_get(&c, &suspended);
+  cr_assert_eq(v, G_MAXLONG);
 }
 
 Test(test_window_size_counter, suspend_resume_multiple_times)