diff --git a/src/misc/blob.hpp b/src/misc/blob.hpp
index ed8c52ac64..6c271cdcfd 100644
--- a/src/misc/blob.hpp
+++ b/src/misc/blob.hpp
@@ -74,6 +74,12 @@ public:
 	/** default constructor - initializes empty blob */
 	FORCEINLINE ByteBlob() { InitEmpty(); }
 
+	/** copy constructor */
+	FORCEINLINE ByteBlob(const ByteBlob &src) {
+		InitEmpty();
+		AppendRaw(src);
+	}
+
 	/** move constructor - take ownership of blob data */
 	FORCEINLINE ByteBlob(BlobHeader * const & src)
 	{
@@ -216,6 +222,14 @@ public:
 		}
 	}
 
+	/** append bytes from given source blob to the end of existing data bytes - reallocates if necessary */
+	FORCEINLINE void AppendRaw(const ByteBlob& src)
+	{
+		if (!src.IsEmpty()) {
+			memcpy(Append(src.Length()), src.Begin(), src.Length());
+		}
+	}
+
 	/** Reallocate if there is no free space for num_bytes bytes.
 	 *  @return pointer to the new data to be added */
 	FORCEINLINE byte *Prepare(uint num_bytes)
diff --git a/src/misc/str.hpp b/src/misc/str.hpp
index c0388852bc..44595e9a6b 100644
--- a/src/misc/str.hpp
+++ b/src/misc/str.hpp
@@ -56,6 +56,15 @@ struct CStrA : public CBlobT<char>
 		}
 	}
 
+	/** Append another CStrA. */
+	FORCEINLINE void Append(const CStrA &src)
+	{
+		if (src.Length() > 0) {
+			base::AppendRaw(src);
+			base::FixTail();
+		}
+	}
+
 	/** Assignment from C string. */
 	FORCEINLINE CStrA &operator = (const char *src)
 	{