diff --git a/library/error.c b/library/error.c
index 31f0a11..4281e89 100644
--- a/library/error.c
+++ b/library/error.c
@@ -496,7 +496,7 @@
             mbedtls_snprintf( buf, buflen, "X509 - Allocation of memory failed" );
         if( use_ret == -(MBEDTLS_ERR_X509_FILE_IO_ERROR) )
             mbedtls_snprintf( buf, buflen, "X509 - Read/write of file failed" );
-#endif /* MBEDTLS_X509_USE,X509_CREATE_C */
+#endif /* MBEDTLS_X509_USE_C || MBEDTLS_X509_CREATE_C */
         // END generated code
 
         if( strlen( buf ) == 0 )