diff --git a/include/Nazara/Core/String.hpp b/include/Nazara/Core/String.hpp
index 4692c4930..dd1622d56 100644
--- a/include/Nazara/Core/String.hpp
+++ b/include/Nazara/Core/String.hpp
@@ -47,6 +47,7 @@ class NAZARA_API NzString : public NzHashable
 
 		NzString& Append(char character);
 		NzString& Append(const char* string);
+		NzString& Append(const char* string, unsigned int length);
 		NzString& Append(const NzString& string);
 
 		void Clear(bool keepBuffer = false);
diff --git a/src/Nazara/Core/String.cpp b/src/Nazara/Core/String.cpp
index e868f8e39..ce05d8e07 100644
--- a/src/Nazara/Core/String.cpp
+++ b/src/Nazara/Core/String.cpp
@@ -197,11 +197,12 @@ NzString& NzString::Append(char character)
 
 NzString& NzString::Append(const char* string)
 {
-	if (!string || !string[0])
-		return *this;
+	return Append(string, std::strlen(string));
+}
 
-	unsigned int length = std::strlen(string);
-	if (length == 0)
+NzString& NzString::Append(const char* string, unsigned int length)
+{
+	if (!string || !string[0] || length == 0)
 		return *this;
 
 	if (m_sharedString->capacity >= m_sharedString->size + length)
@@ -227,6 +228,8 @@ NzString& NzString::Append(const char* string)
 		m_sharedString->string = str;
 	}
 
+	m_sharedString->string[m_sharedString->size] = '\0';
+
 	return *this;
 }