diff --git a/apache2.changes b/apache2.changes
index e9c99da..ca33e40 100644
--- a/apache2.changes
+++ b/apache2.changes
@@ -1,3 +1,13 @@
+-------------------------------------------------------------------
+Fri Jan 31 18:22:09 UTC 2020 - Cristian Rodríguez <crrodriguez@opensuse.org>
+
+- define DEFAULT_LISTENBACKLOG=APR_INT32_MAX. We want apache
+  to honour net.core.somaxconn sysctl as the mandatory limit. 
+  the old value of 511 was never used as until v5.4-rc6 it was 
+  clamped to 128, in current kernels the default limit is 4096. 
+  Cannot use the apr_socket_listen(.., -1) idiom because the function
+  expects a positive integer argument.
+
 -------------------------------------------------------------------
 Mon Jan 20 13:04:23 UTC 2020 - pgajdos@suse.com
 
diff --git a/apache2.spec b/apache2.spec
index 988284f..de80369 100644
--- a/apache2.spec
+++ b/apache2.spec
@@ -451,7 +451,7 @@ for mpm in %{mpms_to_build}; do
 	mv include/ap_config_auto.h.new include/ap_config_auto.h
 	sed -i -e "s@%{_localstatedir}/run@%{runtimedir}@g" include/ap_config_layout.h
 
-	make CFLAGS="%{optflags} -fvisibility=hidden -fPIC -Wall -DDEFAULT_ERRORLOG='\"%{logfiledir}/error_log\"'" %{?_smp_mflags}
+	make CFLAGS="%{optflags} -fvisibility=hidden -fPIC -Wall -DDEFAULT_LISTENBACKLOG=APR_INT32_MAX -DDEFAULT_ERRORLOG='\"%{logfiledir}/error_log\"'" %{?_smp_mflags}
 	make DESTDIR=%{buildroot} install -j1
 
 	# show pathnames in config files