diff --git a/src/util/ConstBuffer.hxx b/src/util/ConstBuffer.hxx
index bd3c405e5..35cffecc2 100644
--- a/src/util/ConstBuffer.hxx
+++ b/src/util/ConstBuffer.hxx
@@ -109,10 +109,6 @@ struct ConstBuffer {
 	constexpr const_iterator cend() const {
 		return data + size;
 	}
-
-	constexpr operator ConstBuffer<void>() const {
-		return { data, size };
-	}
 };
 
 #endif