diff --git a/library/ccm.c b/library/ccm.c
index bec7498..9911e0f 100644
--- a/library/ccm.c
+++ b/library/ccm.c
@@ -512,7 +512,7 @@
 
             return( 1 );
         }
-        mbedtls_platform_memset( plaintext, 0, CCM_SELFTEST_PT_MAX_LEN );
+        memset( plaintext, 0, CCM_SELFTEST_PT_MAX_LEN );
 
         ret = mbedtls_ccm_auth_decrypt( &ctx, msg_len[i],
                                         iv, iv_len[i], ad, add_len[i],