diff --git a/src/apk_defines.h b/src/apk_defines.h
index 9cacf13..e7fe34c 100644
--- a/src/apk_defines.h
+++ b/src/apk_defines.h
@@ -142,6 +142,12 @@ static inline int IS_ERR(const void *ptr) { return (unsigned long)ptr >= (unsign
 #error APK_DEFAULT_ARCH not detected for this architecture
 #endif
 
+#ifndef APK_ABI_TAG
+#define APK_DEFAULT_ABI_TAG	APK_DEFAULT_ARCH
+#else
+#define APK_DEFAULT_ABI_TAG	APK_ABI_TAG "-" APK_DEFAULT_ARCH
+#endif
+
 #define APK_MAX_REPOS		32	/* see struct apk_package */
 #define APK_MAX_TAGS		16	/* see solver; unsigned short */
 #define APK_CACHE_CSUM_BYTES	4