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-rw-r--r--assembler/lex.l2
1 files changed, 1 insertions, 1 deletions
diff --git a/assembler/lex.l b/assembler/lex.l
index 1ba576bf..c12c5054 100644
--- a/assembler/lex.l
+++ b/assembler/lex.l
@@ -7,7 +7,7 @@
#include "string.h"
int saved_state = 0;
-extern char *input_filename;
+extern const char *input_filename;
/* Locations */
int yycolumn = 1;