diff --git a/proc/Makefile.am b/proc/Makefile.am
index 0741c14f..7d6c24a3 100644
--- a/proc/Makefile.am
+++ b/proc/Makefile.am
@@ -4,7 +4,7 @@ lib_LTLIBRARIES = libproc.la
 libproc_la_SOURCES = alloc.c compare.c compare.h devname.c devname.h \
                      ksym.c output.c procps.h pwcache.c readproc.c \
 					 readproc.h sig.c sig.h status.c status.h sysinfo.c \
-					 sysinfo.h tree.h version.c version.h whattime.c \
+					 sysinfo.h version.c version.h whattime.c \
 					 whattime.h
 
 libproc_la_LDFLAGS = -version-info 3:0:0
diff --git a/proc/compare.c b/proc/compare.c
index 46695ac5..7fd3ed0c 100644
--- a/proc/compare.c
+++ b/proc/compare.c
@@ -11,7 +11,6 @@
 #include <stdio.h>		/* for parse error output */
 
 #include "proc/readproc.h"	/* for proc_t */
-#include "proc/tree.h"		/* for struct tree_node */
 
 #include "proc/compare.h"	/* for this code */
 
@@ -67,16 +66,6 @@ int mult_lvl_cmp(void* a, void* b) {
     return 0;
 }
 
-int node_mult_lvl_cmp(void* a, void* b) {
-    int i, cmp_val;
-    for(i = 0; i < sort_depth; i++) {
-        cmp_val = sort_direction[i] * (*sort_function[i])(&(((struct tree_node *)a)->proc),&(((struct tree_node *)b)->proc));
-        if (cmp_val != 0)
-            return cmp_val;
-    }
-    return 0;
-}
-
 /* qsort(3) compliant comparison functions for all members of the ps_proc
    structure (in the same order in which they appear in the proc_t declaration)
    return is {-1,0,1} as {a<b, a==b, a>b}
diff --git a/proc/compare.h b/proc/compare.h
index 153717a9..3056dc6a 100644
--- a/proc/compare.h
+++ b/proc/compare.h
@@ -3,7 +3,6 @@ typedef int (*cmp_t)(void*,void*);       /* for function pointer casts */
 extern void register_sort_function (int dir, cmp_t func);
 extern void reset_sort_options(void);
 extern int mult_lvl_cmp(void* a, void* b);
-extern int node_mult_lvl_cmp(void* a, void* b);
 extern const char *parse_sort_opt(const char* opt);
 extern const char *parse_long_sort(const char* opt);
 
diff --git a/proc/procps.h b/proc/procps.h
index 43be33ab..bd9c6645 100644
--- a/proc/procps.h
+++ b/proc/procps.h
@@ -14,7 +14,6 @@ extern void *xmalloc(unsigned int size);
 extern void *xcalloc(void *pointer, int size);
        
 extern int   mult_lvl_cmp(void* a, void* b);
-extern int   node_mult_lvl_cmp(void* a, void* b);
        
 extern char *user_from_uid(uid_t uid);
 extern char *group_from_gid(gid_t gid);
diff --git a/proc/tree.h b/proc/tree.h
deleted file mode 100644
index f834fa28..00000000
--- a/proc/tree.h
+++ /dev/null
@@ -1,15 +0,0 @@
-/* for oldps.c and proc/compare.c */
-struct tree_node {
-    proc_t *proc;
-    pid_t pid;
-    pid_t ppid;
-    char *line;
-    char *cmd;
-    char **cmdline;
-    char **environ;
-    int children;
-    int maxchildren;
-    int *child;
-    int have_parent;
-};
-
diff --git a/ps/output.c b/ps/output.c
index c30d42a7..2fb7b6db 100644
--- a/ps/output.c
+++ b/ps/output.c
@@ -60,7 +60,6 @@
 
 #include "../proc/readproc.h"
 #include "../proc/sysinfo.h"
-#include "../proc/status.h"
 #include "../proc/procps.h"
 #include "../proc/devname.h"
 #include "common.h"