diff --git a/src/asm/lexer.cpp b/src/asm/lexer.cpp
index 583a21fa..793b9d42 100644
--- a/src/asm/lexer.cpp
+++ b/src/asm/lexer.cpp
@@ -879,7 +879,11 @@ static void discardBlockComment() {
 			continue;
 		case '/':
 			if (peek() == '*') {
-				warning(WARNING_NESTED_COMMENT, "\"/*\" in block comment");
+				warning(
+				    WARNING_NESTED_COMMENT,
+				    "\"/" // Prevent simple syntax highlighters from seeing this as a comment
+				    "*\" in block comment"
+				);
 			}
 			continue;
 		case '*':