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-rw-r--r--src/PJ_horner.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/PJ_horner.cpp b/src/PJ_horner.cpp
index 3a1b7cca..73977de6 100644
--- a/src/PJ_horner.cpp
+++ b/src/PJ_horner.cpp
@@ -408,7 +408,7 @@ static PJ *horner_freeup (PJ *P, int errlev) { /* Destruc
}
-static int parse_coefs (PJ *P, double *coefs, char *param, int ncoefs) {
+static int parse_coefs (PJ *P, double *coefs, const char *param, int ncoefs) {
char *buf, *init, *next = nullptr;
int i;