diff --git a/src/ChangeLog b/src/ChangeLog
index 1edea1e92..0015d0de0 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,5 +1,10 @@
 2001-05-14  Pavel Roskin  <proski@gnu.org>
 
+	* fsusage.c: Include stdlib.h for abort().
+	* tree.c (tree_mkdir_cmd): Disable tree_mkdir_cmd() since it's
+	not used.
+	* widget.c: Declare x_radio_toggle() with arguments.
+
 	* util.h: Remove declarations of some functions defined in
 	background.c.
 
diff --git a/src/fsusage.c b/src/fsusage.c
index 77d689720..10769fde4 100644
--- a/src/fsusage.c
+++ b/src/fsusage.c
@@ -46,6 +46,8 @@ int statfs ();  /* We leave the type ambiguous intentionally here */
 #include <sys/filsys.h>		/* SVR2.  */
 #endif
 
+#include <stdlib.h>
+
 #ifdef HAVE_FCNTL_H
 #include <fcntl.h>
 #endif
diff --git a/src/tree.c b/src/tree.c
index ccec6e038..2e923d7f0 100644
--- a/src/tree.c
+++ b/src/tree.c
@@ -705,6 +705,7 @@ tree_move_cmd (WTree *tree)
     return 1;
 }
 
+#if 0
 static int
 tree_mkdir_cmd (WTree *tree)
 {
@@ -723,6 +724,7 @@ tree_mkdir_cmd (WTree *tree)
     chdir (old_dir);
     return 1;
 }
+#endif
 
 static void
 tree_rmdir_cmd (WTree *tree)
diff --git a/src/widget.c b/src/widget.c
index 632555c30..eabfe0b5f 100644
--- a/src/widget.c
+++ b/src/widget.c
@@ -67,7 +67,7 @@
 #endif
 
 #ifndef PORT_HAS_RADIO_TOGGLE
-#   define x_radio_toggle
+#   define x_radio_toggle(r)
 #endif
 
 static int button_event (Gpm_Event *event, WButton *b);