diff -Nru eventdispatcher-1.1.29.0~bionic/debian/changelog eventdispatcher-1.1.30.0~bionic/debian/changelog
--- eventdispatcher-1.1.29.0~bionic/debian/changelog	2021-04-19 03:41:55.000000000 +0000
+++ eventdispatcher-1.1.30.0~bionic/debian/changelog	2021-04-19 03:41:55.000000000 +0000
@@ -1,3 +1,9 @@
+eventdispatcher (1.1.30.0~bionic) bionic; urgency=high
+
+  * Removed the std::size() for now, it doesn't compile under 16.04.
+
+ -- Alexis Wilke <alexis@m2osw.com>  Sun, 18 Apr 2021 20:41:55 -0700
+
 eventdispatcher (1.1.29.0~bionic) bionic; urgency=high
 
   * Enhanced the signal_handler.
diff -Nru eventdispatcher-1.1.29.0~bionic/eventdispatcher/signal_handler.cpp eventdispatcher-1.1.30.0~bionic/eventdispatcher/signal_handler.cpp
--- eventdispatcher-1.1.29.0~bionic/eventdispatcher/signal_handler.cpp	2021-04-19 03:10:42.000000000 +0000
+++ eventdispatcher-1.1.30.0~bionic/eventdispatcher/signal_handler.cpp	2021-04-19 03:41:55.000000000 +0000
@@ -381,7 +381,7 @@
 {
     cppthread::guard g(f_mutex);
 
-    if(static_cast<std::size_t>(sig) >= std::size(f_signal_actions))
+    if(static_cast<std::size_t>(sig) >= sizeof(f_signal_actions) / sizeof(f_signal_actions[0]))
     {
         throw std::runtime_error(
                   "signal_handler::add_callback() called with invalid signal number "
@@ -489,7 +489,7 @@
 {
     cppthread::guard g(f_mutex);
 
-    for(size_t i = 0; i < std::size(f_signal_actions); ++i)
+    for(size_t i = 0; i < sizeof(f_signal_actions) / sizeof(f_signal_actions[0]); ++i)
     {
         if((sigs & (1L << i)) != 0 && f_signal_actions[i] == nullptr)
         {
@@ -520,7 +520,7 @@
 {
     cppthread::guard g(f_mutex);
 
-    for(size_t i = 0; i < std::size(f_signal_actions); ++i)
+    for(size_t i = 0; i < sizeof(f_signal_actions) / sizeof(f_signal_actions[0]); ++i)
     {
         if((sigs & (1L << i)) != 0 && f_signal_actions[i] == nullptr)
         {
@@ -548,7 +548,7 @@
 {
     cppthread::guard g(f_mutex);
 
-    for(size_t i = 0; i < std::size(f_signal_actions); ++i)
+    for(size_t i = 0; i < sizeof(f_signal_actions) / sizeof(f_signal_actions[0]); ++i)
     {
         if((sigs & (1L << i)) != 0 && f_signal_actions[i] != nullptr)
         {
@@ -592,7 +592,7 @@
  */
 char const * signal_handler::get_signal_name(int sig)
 {
-    if(static_cast<std::size_t>(sig) >= std::size(g_signal_names))
+    if(static_cast<std::size_t>(sig) >= sizeof(g_signal_names) / sizeof(g_signal_names[0]))
     {
         return nullptr;
     }