diff --git a/kleidicv/include/kleidicv/dispatch.h b/kleidicv/include/kleidicv/dispatch.h
index 18f9056c0358f4a732fb2e8e4101173f2f9a261d..bdab7d7b758788440838f063e8db82fdb2b28fb4 100644
--- a/kleidicv/include/kleidicv/dispatch.h
+++ b/kleidicv/include/kleidicv/dispatch.h
@@ -7,7 +7,7 @@
 
 #include "kleidicv/config.h"
 
-#if KLEIDICV_HAVE_SVE2 || KLEIDICV_HAVE_SME2
+#if defined(KLEIDICV_HAVE_SVE2) || defined(KLEIDICV_HAVE_SME2)
 #include <sys/auxv.h>
 
 #include <type_traits>