diff --git a/unix/Makefile b/unix/Makefile
index 1c5a9b8..07fccb8 100644
--- a/unix/Makefile
+++ b/unix/Makefile
@@ -3,18 +3,15 @@ CFLAGS	= -Wall -Wextra
 OS	!= uname -s
 
 BIN	= restartable
-.if $(OS) != "FreeBSD" && $(OS) != "NetBSD"
-OBJS	= kinfo_getvmmap.o
-.else
+#.if $(OS) != "FreeBSD" && $(OS) != "NetBSD"
+#OBJS	= kinfo_getvmmap.o
+#.else
 OBJS	=
-.endif
+#.endif
 
 $(BIN): restartable.c $(OBJS)
 	$(CC) $(CFLAGS) -o $@ $< $(OBJS) -lutil -lkvm
 
-kinfo_getvmmap.o: kinfo_getvmmap.c
-	$(CC) $(CFLAGS) -o $@ $<
-
 .PHONY: clean
 clean:
 	rm -f $(BIN) $(OBJS)
diff --git a/unix/kinfo_getvmmap.c b/unix/kinfo_getvmmap.c
deleted file mode 100644
index 4766b73..0000000
--- a/unix/kinfo_getvmmap.c
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * Adapted from NetBSD lib/libutil/kinfo_getvmmap.c
- */
-
-#include <sys/cdefs.h>
-
-#include <sys/param.h>
-#include <sys/sysctl.h>
-#include <stdlib.h>
-#include <string.h>
-#include <util.h>
-#include <uvm/uvm_param.h>
-
-struct kinfo_vmentry *
-kinfo_getvmmap(pid_t pid, size_t *cntp)
-{
-	int mib[5];
-	int error;
-	size_t len;
-	struct kinfo_vmentry *kiv;
-
-	*cntp = 0;
-	len = 0;
-	mib[0] = CTL_VM;
-	mib[1] = KERN_PROC;
-	mib[2] = KERN_PROC_VMMAP;
-	mib[3] = pid;
-	mib[4] = sizeof(*kiv);
-
-	error = sysctl(mib, nitems(mib), NULL, &len, NULL, 0);
-	if (error)
-		return NULL;
-
-	len = len * 4 / 3;
-
-	kiv = malloc(len);
-	if (kiv == NULL)
-		return NULL;
-
-	error = sysctl(mib, nitems(mib), kiv, &len, NULL, 0);
-	if (error) {
-		free(kiv);
-		return NULL;
-	}
-
-	*cntp = len / sizeof(*kiv);
-	return kiv;	/* Caller must free() return value */
-}
diff --git a/unix/restartable.c b/unix/restartable.c
index 683182d..6c5c9d7 100644
--- a/unix/restartable.c
+++ b/unix/restartable.c
@@ -40,32 +40,30 @@
 #else
 #include <sys/param.h>
 #include <sys/sysctl.h>
+#if defined(__NetBSD__)
 #include <util.h>
-#ifdef __OpenBSD__
-#include <sys/file.h>
+#elif defined(__DragonFly__)
+#include <sys/user.h>
 #endif
 #endif
 
 #include <fcntl.h>
 #include <limits.h>	/* _POSIX2_LINE_MAX */
 
-#if defined(__NetBSD__) || defined(__OpenBSD__)
-#ifdef __NetBSD__
+#if defined(__NetBSD__)
 #define kinfo_proc	kinfo_proc2
 #define kvm_getargv	kvm_getargv2
-#endif
 #define ki_comm	 	p_comm
 #define ki_login	p_login
 #define ki_pid	 	p_pid
 #define ki_ppid	 	p_ppid
 #define ki_ruid	 	p_ruid
-#endif
-
-#if defined(__OpenBSD__)
-struct kinfo_vmentry *kinfo_getvmmap(pid_t, size_t *);
-#define KVME_PROT_EXEC	KVE_PROT_EXEC
-#define KVME_TYPE_VNODE	DTYPE_VNODE
-#define kve_type	kve_etype
+#elif defined(__DragonFly__)
+#define ki_comm		kp_comm
+#define ki_login	kp_login
+#define ki_pid		kp_pid
+#define ki_ppid		kp_ppid
+#define ki_ruid		kp_ruid
 #endif
 
 static int verbose = 0;
@@ -104,10 +102,9 @@ print_argv(kvm_t *kd, const struct kinfo_proc *kp) {
 
 static void
 print_proc(kvm_t *kd, const struct kinfo_proc *kp) {
-	struct kinfo_vmentry *vmmap;
 #if defined(__FreeBSD__)
 	int i, count;
-#elif defined(__NetBSD__) || defined(__OpenBSD__)
+#elif defined(__NetBSD__)
 	unsigned int i;
 	size_t count;
 #endif
@@ -115,7 +112,8 @@ print_proc(kvm_t *kd, const struct kinfo_proc *kp) {
 	if (kp->ki_pid == 0)
 		return;
 
-	vmmap = kinfo_getvmmap(kp->ki_pid, &count);
+#if defined(__FreeBSD__) || defined(__NetBSD__)
+	struct kinfo_vmentry *vmmap = kinfo_getvmmap(kp->ki_pid, &count);
 	if (vmmap == NULL)
 		err(1, "kinfo_getvmmap(): %d", kp->ki_pid);
 
@@ -128,6 +126,7 @@ print_proc(kvm_t *kd, const struct kinfo_proc *kp) {
 		}
 
 	free(vmmap);
+#endif
 }
 
 static int
@@ -147,10 +146,8 @@ print_all(void) {
 		err(1, "kinfo_getallproc()");
 #elif defined(__NetBSD__)
 	procs = kvm_getproc2(kd, KERN_PROC_ALL, 0, sizeof(struct kinfo_proc2), &count);
-#elif defined(__OpenBSD__)
-	procs = kvm_getprocs(kd, KERN_PROC_ALL, 0, sizeof(struct kinfo_proc), &count);
 #else
-	procs = kvm_getprocs(kd, KERN_PROC_ALL, &count);
+	procs = kvm_getprocs(kd, KERN_PROC_ALL, 0, &count);
 #endif
 	if (procs == NULL)
 		 err(1, "kvm_getprocs(): %s", kvm_geterr(kd));