diff --git a/libs/util/source/unicode.cpp b/libs/util/source/unicode.cpp
index 81e98cd3..112483f8 100644
--- a/libs/util/source/unicode.cpp
+++ b/libs/util/source/unicode.cpp
@@ -49,7 +49,7 @@ namespace psemek::util
 		if (!is_middle_byte(*ptr))
 			throw invalid_utf8(ptr);
 #else
-		(void*)ptr;
+		(void)is_middle_byte(*ptr);
 #endif
 	}