diff --git a/examples/Plugins/DSPModulePluginDemo.h b/examples/Plugins/DSPModulePluginDemo.h
index 536c8da092..1c0f6e6ffb 100644
--- a/examples/Plugins/DSPModulePluginDemo.h
+++ b/examples/Plugins/DSPModulePluginDemo.h
@@ -1282,6 +1282,9 @@ private:
                                 thiran.pushSample (int (channel), input);
                                 thiran.setDelay ((float) delay);
                                 return thiran.popSample (int (channel));
+
+                            default:
+                                break;
                         }
 
                         jassertfalse;
diff --git a/extras/AudioPerformanceTest/Source/Main.cpp b/extras/AudioPerformanceTest/Source/Main.cpp
index 2a6f893be6..dde8cd9d00 100644
--- a/extras/AudioPerformanceTest/Source/Main.cpp
+++ b/extras/AudioPerformanceTest/Source/Main.cpp
@@ -19,8 +19,6 @@
 #include <JuceHeader.h>
 #include "MainComponent.h"
 
-Component* createMainContentComponent();
-
 //==============================================================================
 class AudioPerformanceTestApplication  : public JUCEApplication
 {
diff --git a/modules/juce_core/native/juce_linux_Network.cpp b/modules/juce_core/native/juce_linux_Network.cpp
index b0d3e2d708..f323139114 100644
--- a/modules/juce_core/native/juce_linux_Network.cpp
+++ b/modules/juce_core/native/juce_linux_Network.cpp
@@ -333,7 +333,7 @@ private:
 
         struct addrinfo* result = nullptr;
 
-        if (getaddrinfo (serverName.toUTF8(), String (port).toUTF8(), &hints, &result) != 0 || result == 0)
+        if (getaddrinfo (serverName.toUTF8(), String (port).toUTF8(), &hints, &result) != 0 || result == nullptr)
             return 0;
 
         {
@@ -351,7 +351,7 @@ private:
 
         int receiveBufferSize = 16384;
         setsockopt (socketHandle, SOL_SOCKET, SO_RCVBUF, (char*) &receiveBufferSize, sizeof (receiveBufferSize));
-        setsockopt (socketHandle, SOL_SOCKET, SO_KEEPALIVE, 0, 0);
+        setsockopt (socketHandle, SOL_SOCKET, SO_KEEPALIVE, nullptr, 0);
 
       #if JUCE_MAC
         setsockopt (socketHandle, SOL_SOCKET, SO_NOSIGPIPE, 0, 0);