diff --git a/include/mbedtls/gcm.h b/include/mbedtls/gcm.h
index f475710..2f9a2cd 100644
--- a/include/mbedtls/gcm.h
+++ b/include/mbedtls/gcm.h
@@ -33,11 +33,6 @@
 #define MBEDTLS_GCM_ENCRYPT     1
 #define MBEDTLS_GCM_DECRYPT     0
 
-#define MBEDTLS_GCM_ACC_SMALLTABLE  0
-#define MBEDTLS_GCM_ACC_LARGETABLE  1
-#define MBEDTLS_GCM_ACC_AESNI       2
-#define MBEDTLS_GCM_ACC_AESCE       3
-
 /** Authenticated decryption failed. */
 #define MBEDTLS_ERR_GCM_AUTH_FAILED                       -0x0012
 /** Bad input parameters to function. */
diff --git a/include/mbedtls/mbedtls_config.h b/include/mbedtls/mbedtls_config.h
index f467737..18dbcd1 100644
--- a/include/mbedtls/mbedtls_config.h
+++ b/include/mbedtls/mbedtls_config.h
@@ -2807,6 +2807,9 @@
  * Can significantly increase throughput on systems without GCM hardware
  * acceleration (e.g., AESNI, AESCE).
  *
+ * The mbedtls_gcm_context size will increase by 3840 bytes.
+ * The code size will increase by roughly 344 bytes.
+ *
  * Module:  library/gcm.c
  *
  * Requires: MBEDTLS_GCM_C