diff --git a/config/features.m4 b/config/features.m4
index a0a6c4741..b930ffdd0 100644
--- a/config/features.m4
+++ b/config/features.m4
@@ -66,10 +66,14 @@ AC_DEFUN([CONFIG_FEATURES],
     AC_DEFINE(OQS_ENABLE_KEM_bike3_l3, 1, "Define to 1 when BIKE3-L3 enabled")
     AC_DEFINE(OQS_ENABLE_KEM_bike3_l5, 1, "Define to 1 when BIKE3-L5 enabled")
 
-    AM_COND_IF([USE_AVX2_INSTRUCTIONS],
-               [AM_CONDITIONAL([BIKE_ADDITIONAL_IMPL], [test x$gcc_cv_compiler = xtrue])
-                AM_COND_IF([BIKE_ADDITIONAL_IMPL], [AC_DEFINE(OQS_KEM_BIKE_ADDITIONAL_IMPLEMENTATION, 1, "Define to 1 when BIKE uses the additional implementation")])
-               ])
+    AM_COND_IF([USE_AES_INSTRUCTIONS],
+      [AM_COND_IF([USE_AVX2_INSTRUCTIONS],
+        [
+          AM_CONDITIONAL([BIKE_ADDITIONAL_IMPL], [test x$gcc_cv_compiler = xtrue])
+          AM_COND_IF([BIKE_ADDITIONAL_IMPL], [AC_DEFINE(OQS_KEM_BIKE_ADDITIONAL_IMPLEMENTATION, 1, "Define to 1 when BIKE uses the additional implementation")])
+        ]
+      )]
+    )
   ])
 
 ##### OQS_COPY_FROM_PQCLEAN_FRAGMENT_AM_COND_IF_START