diff --git a/src/asm/lexer.cpp b/src/asm/lexer.cpp
index fa7601e0..56e4fc27 100644
--- a/src/asm/lexer.cpp
+++ b/src/asm/lexer.cpp
@@ -2362,6 +2362,9 @@ yy::parser::symbol_type yylex() {
 	lexerState->lastToken = token.type;
 	lexerState->atLineStart = token.type == T_(NEWLINE) || token.type == T_(EOB);
 
+	// Uncomment this if you want to debug what the lexer is lexing:
+	// fprintf(stderr, "{lexing %s}\n", yy::parser::symbol_type(token.type).name());
+
 	if (std::holds_alternative<uint32_t>(token.value)) {
 		return yy::parser::symbol_type(token.type, std::get<uint32_t>(token.value));
 	} else if (std::holds_alternative<std::string>(token.value)) {