diff --git a/include/psa/crypto_values.h b/include/psa/crypto_values.h
index 19dc28b..2c0acf3 100644
--- a/include/psa/crypto_values.h
+++ b/include/psa/crypto_values.h
@@ -837,9 +837,14 @@
     (((mac_alg) & PSA_ALG_MAC_TRUNCATION_MASK) >> PSA_MAC_TRUNCATION_OFFSET)
 
 #define PSA_ALG_CIPHER_MAC_BASE                 ((psa_algorithm_t)0x02c00000)
+/** The CBC-MAC construction over a block cipher
+ *
+ * \warning CBC-MAC is insecure in many cases.
+ * A more secure mode, such as #PSA_ALG_CMAC, is recommended.
+ */
 #define PSA_ALG_CBC_MAC                         ((psa_algorithm_t)0x02c00001)
+/** The CMAC construction over a block cipher */
 #define PSA_ALG_CMAC                            ((psa_algorithm_t)0x02c00002)
-#define PSA_ALG_GMAC                            ((psa_algorithm_t)0x02c00003)
 
 /** Whether the specified algorithm is a MAC algorithm based on a block cipher.
  *
@@ -897,8 +902,16 @@
  */
 #define PSA_ALG_CTR                             ((psa_algorithm_t)0x04c00001)
 
+/** The CFB stream cipher mode.
+ *
+ * The underlying block cipher is determined by the key type.
+ */
 #define PSA_ALG_CFB                             ((psa_algorithm_t)0x04c00002)
 
+/** The OFB stream cipher mode.
+ *
+ * The underlying block cipher is determined by the key type.
+ */
 #define PSA_ALG_OFB                             ((psa_algorithm_t)0x04c00003)
 
 /** The XTS cipher mode.
@@ -942,10 +955,14 @@
      (PSA_ALG_CATEGORY_AEAD | PSA_ALG_AEAD_FROM_BLOCK_FLAG))
 
 /** The CCM authenticated encryption algorithm.
+ *
+ * The underlying block cipher is determined by the key type.
  */
 #define PSA_ALG_CCM                             ((psa_algorithm_t)0x06401001)
 
 /** The GCM authenticated encryption algorithm.
+ *
+ * The underlying block cipher is determined by the key type.
  */
 #define PSA_ALG_GCM                             ((psa_algorithm_t)0x06401002)
 
diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index 2285694..5245e61 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -2005,8 +2005,6 @@
     }
     else if( alg == PSA_ALG_CMAC )
         mode = MBEDTLS_MODE_ECB;
-    else if( alg == PSA_ALG_GMAC )
-        mode = MBEDTLS_MODE_GCM;
     else
         return( NULL );
 
diff --git a/tests/suites/test_suite_psa_crypto_metadata.data b/tests/suites/test_suite_psa_crypto_metadata.data
index b011ad5..f5d5a33 100644
--- a/tests/suites/test_suite_psa_crypto_metadata.data
+++ b/tests/suites/test_suite_psa_crypto_metadata.data
@@ -150,18 +150,6 @@
 depends_on:MBEDTLS_DES_C:MBEDTLS_CMAC_C
 mac_algorithm:PSA_ALG_CMAC:ALG_IS_BLOCK_CIPHER_MAC:8:PSA_KEY_TYPE_DES:192
 
-MAC: GMAC-AES-128
-depends_on:MBEDTLS_AES_C:MBEDTLS_GCM_C
-mac_algorithm:PSA_ALG_GMAC:ALG_IS_BLOCK_CIPHER_MAC:16:PSA_KEY_TYPE_AES:128
-
-MAC: GMAC-AES-192
-depends_on:MBEDTLS_AES_C:MBEDTLS_GCM_C
-mac_algorithm:PSA_ALG_GMAC:ALG_IS_BLOCK_CIPHER_MAC:16:PSA_KEY_TYPE_AES:192
-
-MAC: GMAC-AES-256
-depends_on:MBEDTLS_AES_C:MBEDTLS_GCM_C
-mac_algorithm:PSA_ALG_GMAC:ALG_IS_BLOCK_CIPHER_MAC:16:PSA_KEY_TYPE_AES:256
-
 Cipher: ARC4
 depends_on:MBEDTLS_ARC4_C
 cipher_algorithm:PSA_ALG_ARC4:ALG_IS_STREAM_CIPHER