diff --git a/lib/lmdb/mdb.c b/lib/lmdb/mdb.c
index a90d7d5..e73bbd5 100644
--- a/lib/lmdb/mdb.c
+++ b/lib/lmdb/mdb.c
@@ -237,7 +237,11 @@ mdb_sem_wait(sem_t *sem)
  * Otherwise compile with the less efficient -DMDB_DSYNC=O_SYNC.
  */
 #ifndef MDB_DSYNC
+#ifdef O_DSYNC
 # define MDB_DSYNC	O_DSYNC
+#else
+# define MDB_DSYNC      O_SYNC
+#endif
 #endif
 #endif
 
diff --git a/src/server/command_list.c b/src/server/command_list.c
index 4dc78e9..c12c44e 100644
--- a/src/server/command_list.c
+++ b/src/server/command_list.c
@@ -1,5 +1,6 @@
 #include <arpa/inet.h>
 #include <string.h>
+#include <sys/socket.h>
 #include <unistd.h>
 #include "nanomsg/nn.h"
 #include "snappy.h"
diff --git a/src/server/self_path.c b/src/server/self_path.c
index 2f2647d..238701b 100644
--- a/src/server/self_path.c
+++ b/src/server/self_path.c
@@ -53,4 +53,26 @@ const char *get_self_path() {
 	return (path);
 }
 
+#elif defined __FreeBSD__
+
+# include <sys/types.h>
+# include <sys/sysctl.h>
+# include <limits.h>
+
+const char *get_self_path() {
+	static char path[PATH_MAX] = { '\0' };
+
+	if ( path[0] == '\0' ) {
+		int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1 };
+		size_t size = sizeof(path);
+		char *pt;
+
+		sysctl(mib, sizeof(mib)/sizeof(*mib), path, &size, NULL, 0);
+		if ((pt = strrchr(path, '/')) != NULL)
+			*pt = '\0';
+		return path;
+	}
+	return path;
+}
+
 #endif
diff --git a/src/server/server.c b/src/server/server.c
index 081d9cf..ac79f71 100644
--- a/src/server/server.c
+++ b/src/server/server.c
@@ -1,4 +1,6 @@
+#ifdef __linux__
 #include <linux/limits.h>
+#endif
 #include <unistd.h>
 #include <netdb.h>
 #include <netinet/in.h>