diff --git a/include/psa/crypto_values.h b/include/psa/crypto_values.h
index 50df3e3..241b7c8 100644
--- a/include/psa/crypto_values.h
+++ b/include/psa/crypto_values.h
@@ -2117,7 +2117,7 @@
 
 #define PSA_ALG_IS_PBKDF2(kdf_alg)                                      \
     (PSA_ALG_IS_PBKDF2_HMAC(kdf_alg) || \
-     (kdf_alg == PSA_ALG_PBKDF2_AES_CMAC_PRF_128))
+     ((kdf_alg) == PSA_ALG_PBKDF2_AES_CMAC_PRF_128))
 
 #define PSA_ALG_KEY_DERIVATION_MASK             ((psa_algorithm_t) 0xfe00ffff)
 #define PSA_ALG_KEY_AGREEMENT_MASK              ((psa_algorithm_t) 0xffff0000)