diff --git a/src/core/build.h b/src/core/build.h
index d5e55506cf3..24873ab9d7f 100644
--- a/src/core/build.h
+++ b/src/core/build.h
@@ -154,4 +154,4 @@
         _BLKID_FEATURE_ " "                                             \
         _ELFUTILS_FEATURE_ " "                                          \
         _KMOD_FEATURE_ " "                                              \
-        _IDN_FEATURE_ " "
+        _IDN_FEATURE_