diff --git a/include/E/E_System.hpp b/include/E/E_System.hpp
index f34fda6ce..f95a463a1 100644
--- a/include/E/E_System.hpp
+++ b/include/E/E_System.hpp
@@ -126,6 +126,7 @@ class System : private Log {
     auto module = std::make_shared<T>(std::forward<Args>(args)...);
     module->id = newModuleID();
     bool ret = registeredModule.insert({module->id, module}).second;
+    (void)ret;
     assert(ret);
     return module;
   }
diff --git a/include/E/Networking/E_Host.hpp b/include/E/Networking/E_Host.hpp
index fabdc2d75..d0d6bf987 100644
--- a/include/E/Networking/E_Host.hpp
+++ b/include/E/Networking/E_Host.hpp
@@ -378,12 +378,14 @@ class Host : public NetworkModule, public NetworkLog, public RoutingInfo {
     if constexpr (std::is_base_of<HostModule, T>::value) {
       auto hostModuleName = hostModule->getHostModuleName();
       bool ret = hostModuleMap.insert({hostModuleName, hostModule}).second;
+      (void)ret;
       assert(ret);
     }
 
     if constexpr (std::is_base_of<TimerModule, T>::value) {
       auto timerModuleName = hostModule->getTimerModuleName();
       bool ret = timerModuleMap.insert({timerModuleName, hostModule}).second;
+      (void)ret;
       assert(ret);
     }
 
@@ -393,6 +395,7 @@ class Host : public NetworkModule, public NetworkLog, public RoutingInfo {
               .insert({Namespace(hostModule->domain, hostModule->protocol),
                        hostModule})
               .second;
+      (void)ret;
       assert(ret);
     }
   }
diff --git a/src/Networking/E_Host.cpp b/src/Networking/E_Host.cpp
index 13a7185d9..1e9cef049 100644
--- a/src/Networking/E_Host.cpp
+++ b/src/Networking/E_Host.cpp
@@ -147,6 +147,7 @@ Module::Message Host::messageReceived(const ModuleID from,
     assert(iter != processInfoMap.end());
 
     for (auto allSyscall : syscallMap) {
+      (void)allSyscall;
       assert(
           allSyscall.second !=
           iter->second.application->pid); // no syscall pending for returned app