diff --git a/src/CSFML/Network/IpAddress.cpp b/src/CSFML/Network/IpAddress.cpp
index ba35c6fd..df5fb513 100644
--- a/src/CSFML/Network/IpAddress.cpp
+++ b/src/CSFML/Network/IpAddress.cpp
@@ -74,6 +74,7 @@ const sfIpAddress sfIpAddress_Broadcast = sfIpAddress_fromBytes(255, 255, 255, 2
 ////////////////////////////////////////////////////////////
 sfIpAddress sfIpAddress_fromString(const char* address)
 {
+    assert(address);
     return fromSFMLAddress(sf::IpAddress::resolve(address));
 }
 
diff --git a/src/CSFML/Window/Context.cpp b/src/CSFML/Window/Context.cpp
index c8bdaa66..b8bd4a06 100644
--- a/src/CSFML/Window/Context.cpp
+++ b/src/CSFML/Window/Context.cpp
@@ -47,6 +47,7 @@ void sfContext_destroy(const sfContext* context)
 ////////////////////////////////////////////////////////////
 bool sfContext_isExtensionAvailable(const char* name)
 {
+    assert(name);
     return sf::Context::isExtensionAvailable(name);
 }