diff --git a/nshlib/nsh.h b/nshlib/nsh.h
index bf0b61f9d..0a7bdd0e4 100644
--- a/nshlib/nsh.h
+++ b/nshlib/nsh.h
@@ -651,10 +651,10 @@
 #  define HAVE_DF_HUMANREADBLE 1
 #  define HAVE_DF_BLOCKOUTPUT  1
 #  if defined(CONFIG_FS_PROCFS_EXCLUDE_USAGE)
-#    undefine HAVE_DF_HUMANREADBLE
+#    undef HAVE_DF_HUMANREADBLE
 #  endif
 #  if defined(CONFIG_FS_PROCFS_EXCLUDE_BLOCKS)
-#    undefine HAVE_DF_BLOCKOUTPUT
+#    undef HAVE_DF_BLOCKOUTPUT
 #  endif
 #endif