diff --git a/library/ccm.c b/library/ccm.c
index 1e644dc..81bdfe7 100644
--- a/library/ccm.c
+++ b/library/ccm.c
@@ -326,7 +326,7 @@
     return 0;
 }
 
-MBEDTLS_OPTIMIZE_ALWAYS
+MBEDTLS_OPTIMIZE_FOR_PERFORMANCE
 int mbedtls_ccm_update(mbedtls_ccm_context *ctx,
                        const unsigned char *input, size_t input_len,
                        unsigned char *output, size_t output_size,