1 files changed, 1 insertions, 1 deletions
diff --git a/src/pqf.c b/src/pqf.c
index a6e255b..50657cc 100644
--- a/src/pqf.c
+++ b/src/pqf.c
@@ -131,7 +131,7 @@ static pqf_status_t check_params(uint16_t subband_sz, uint16_t subbands_num, uin
     return PQF_SUCCESS;
 }
 
-pqf_status_t pqf_create_a_ctx(uint16_t subband_sz, uint16_t subbands_num, uint16_t proto_sz, float* proto, pqf_a_ctx_t* ctx_result)
+pqf_status_t pqf_create_a_ctx(uint16_t subband_sz, uint16_t subbands_num, uint16_t proto_sz, const float* proto, pqf_a_ctx_t* ctx_result)
 {
     uint16_t i = 0;