diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index 9145a6d..50a9990 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -1191,7 +1191,7 @@
 
         switch( alg )
         {
-            case PSA_ALG_STREAM_CIPHER:
+            case PSA_ALG_STREAM_CIPHER_BASE:
                 mode = MBEDTLS_MODE_STREAM;
                 break;
             case PSA_ALG_CBC_BASE: