diff --git a/modules/juce_core/network/juce_IPAddress.cpp b/modules/juce_core/network/juce_IPAddress.cpp
index 780e7c1578..7607f071f0 100644
--- a/modules/juce_core/network/juce_IPAddress.cpp
+++ b/modules/juce_core/network/juce_IPAddress.cpp
@@ -107,6 +107,8 @@ IPAddress::IPAddress (const String& adr)
 
         for (int i = 0; i < 4; ++i)
             address[i] = (uint8) tokens[i].getIntValue();
+
+        zeroUnusedBytes();
     }
     else
     {