Index: src/common/compat.h
--- src/common/compat.h.orig
+++ src/common/compat.h
@@ -23,7 +23,8 @@
 #endif
 
 #if (defined(__linux__) || defined(__GLIBC__) || defined(__FreeBSD__) || \
-		defined(__darwin__) || defined(__NetBSD__))
+		defined(__darwin__) || defined(__NetBSD__) || \
+		defined(__OpenBSD__))
 
 #ifndef RTLD_NEXT
 #define RTLD_NEXT	((void *) -1)
@@ -58,7 +59,7 @@ void tsocks_once(tsocks_once_t *o, void (*init_routine
 
 #else
 #error "OS not supported."
-#endif /* __linux__, __GLIBC__, __darwin__, __FreeBSD__, __NetBSD__ */
+#endif /* __linux__, __GLIBC__, __darwin__, __FreeBSD__, __NetBSD__, __OpenBSD__ */
 
 #if defined(__linux__)
 #include <unistd.h>
@@ -196,7 +197,8 @@ void tsocks_once(tsocks_once_t *o, void (*init_routine
 
 #endif /* __linux__ */
 
-#if (defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__darwin__) || defined(__NetBSD__))
+#if (defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__darwin__) || \
+		defined(__NetBSD__) || defined(__OpenBSD__))
 
 #include <sys/syscall.h>
 #include <unistd.h>
@@ -215,7 +217,7 @@ void tsocks_once(tsocks_once_t *o, void (*init_routine
 #define TSOCKS_NR_LISTEN    SYS_listen
 #define TSOCKS_NR_RECVMSG   SYS_recvmsg
 
-#endif /* __FreeBSD__, __FreeBSD_kernel__, __darwin__, __NetBSD__ */
+#endif /* __FreeBSD__, __FreeBSD_kernel__, __darwin__, __NetBSD__, __OpenBSD__ */
 
 #define TSOCKS_CLASSA_NET   0xff000000
 #define TSOCKS_LOOPBACK_NET 0x7f000000