diff --git a/src/ogfx/render/BasicRenderer.cpp b/src/ogfx/render/BasicRenderer.cpp
index 606e71b..c8b4290 100644
--- a/src/ogfx/render/BasicRenderer.cpp
+++ b/src/ogfx/render/BasicRenderer.cpp
@@ -248,7 +248,7 @@ namespace ogfx
 		if (!font) font = m_font;
 
 		auto l_buildCacheKey = [&](void) -> String {
-			return String("").add(message).add(fontSize).add(reinterpret_cast<uintptr_t>(font));
+			return String("").add(message).add(fontSize).add(font);
 		};
 
 		String cacheKey = l_buildCacheKey();
diff --git a/src/ostd/string/String.cpp b/src/ostd/string/String.cpp
index 6bb07d4..2e0cf75 100644
--- a/src/ostd/string/String.cpp
+++ b/src/ostd/string/String.cpp
@@ -265,6 +265,13 @@ namespace ostd
 		return add(s);
 	}
 
+	String& String::add(const void* p, const String& prefix)
+	{
+		std::stringstream stream;
+		stream << prefix << std::hex << std::uppercase << reinterpret_cast<uintptr_t>(p);
+		return add(stream.str());
+	}
+
 
 
 	//New String
@@ -431,6 +438,12 @@ namespace ostd
 		return __str.add(f, precision);
 	}
 
+	String String::new_add(const void* p, const String& prefix)
+	{
+		String __str = m_data;
+		return __str.add(p, prefix);
+	}
+
 
 
 	//Utility
diff --git a/src/ostd/string/String.hpp b/src/ostd/string/String.hpp
index 22fa7b3..f427bb7 100644
--- a/src/ostd/string/String.hpp
+++ b/src/ostd/string/String.hpp
@@ -122,6 +122,7 @@ namespace ostd
 			String& add(i64 i);
 			String& add(f32 f, u8 precision = 0);
 			String& add(f64 f, u8 precision = 0);
+			String& add(const void* p, const String& prefix = "0x");
 
 			//New String
 			String new_ltrim(void) const;
@@ -152,6 +153,7 @@ namespace ostd
 			String new_add(i64 i) const;
 			String new_add(f32 f, u8 precision = 0) const;
 			String new_add(f64 f, u8 precision = 0) const;
+			String new_add(const void* p, const String& prefix = "0x");
 
 			//Utility
 			i64 toInt(void) const;