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-rw-r--r--lib/average_exponential.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/average_exponential.c b/lib/average_exponential.c
index bae9d5f..1875bc3 100644
--- a/lib/average_exponential.c
+++ b/lib/average_exponential.c
@@ -40,7 +40,7 @@ int ts_average_exponential(
TS_PROLOGUE( ts_average_exponential_p );
if ( !c ) return -1;
TS_CHECK_INPUT(x, x_n, n);
- fp_t k = ((ts_average_exponential_params_t *)c)->k;
+ fp_t k = ((ts_average_exponential_params_t const *)c)->k;
if (k <= 0 || isnan(k)) return -1;
fp_t a = 1.0 / k;