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-rw-r--r--eqn/eqnbox.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/eqn/eqnbox.c b/eqn/eqnbox.c
index c51f0a4b95dc..2a9a4bc5d832 100644
--- a/eqn/eqnbox.c
+++ b/eqn/eqnbox.c
@@ -37,7 +37,7 @@ eqnbox(int p1, int p2, int lu) {
#else /* NEQN */
int b, h;
#endif /* NEQN */
- char *sh;
+ const char *sh;
yyval.token = p1;
b = max(ebase[p1], ebase[p2]);