diff --git a/configure.ac b/configure.ac
index 16b7cf5d4..3a113db85 100644
--- a/configure.ac
+++ b/configure.ac
@@ -186,7 +186,7 @@ AC_ARG_ENABLE(fortress,
 
 if test "$ENABLED_FORTRESS" = "yes"
 then
-    AM_CFLAGS="$AM_CFLAGS -DFORTRESS -DOPENSSL_EXTRA -DCYASSL_DES_ECB -DCYASSL_AES_COUNTER -DCYASSL_AES_DIRECT -DCYASSL_DER_LOAD -DCYASSL_SHA512 -DCYASSL_SHA34 -DCYASSL_KEY_GEN"
+    AM_CFLAGS="$AM_CFLAGS -DFORTRESS -DOPENSSL_EXTRA -DCYASSL_DES_ECB -DCYASSL_AES_COUNTER -DCYASSL_AES_DIRECT -DCYASSL_DER_LOAD -DCYASSL_SHA512 -DCYASSL_SHA384 -DCYASSL_KEY_GEN"
 fi