diff --git a/netwerk/sctp/src/moz.build b/netwerk/sctp/src/moz.build
index 3000b3d73..8d4dd51bf 100644
--- a/netwerk/sctp/src/moz.build
+++ b/netwerk/sctp/src/moz.build
@@ -73,7 +73,6 @@ else:
 
 if CONFIG['OS_TARGET'] == 'Darwin':
     DEFINES['__APPLE_USE_RFC_2292'] = 1
-    DEFINES['__APPLE__'] = False
 
 if CONFIG['OS_TARGET'] in ('Linux', 'Android'):
     # to make sure that in6_pktinfo gets defined on all distros
diff --git a/netwerk/sctp/src/netinet/sctp_os_userspace.h b/netwerk/sctp/src/netinet/sctp_os_userspace.h
index 05f655aa9..5a210aea1 100755
--- a/netwerk/sctp/src/netinet/sctp_os_userspace.h
+++ b/netwerk/sctp/src/netinet/sctp_os_userspace.h
@@ -1111,6 +1111,16 @@ sctp_get_mbuf_for_msg(unsigned int space_needed, int want_header, int how, int a
 	} while (0)
 #endif
 
+/* TenFourFox: we need both of these macros */
+#define TAILQ_FOREACH_SAFE(var, head, field, tvar)             \
+         for ((var) = ((head)->tqh_first);                     \
+              (var) && ((tvar) = TAILQ_NEXT((var), field), 1); \
+              (var) = (tvar))
+#define LIST_FOREACH_SAFE(var, head, field, tvar)              \
+         for ((var) = ((head)->lh_first);                      \
+              (var) && ((tvar) = LIST_NEXT((var), field), 1);  \
+              (var) = (tvar))
+
 #if defined(__linux__)
 #if !defined(TAILQ_FOREACH_SAFE)
 #define TAILQ_FOREACH_SAFE(var, head, field, tvar)             \
diff --git a/netwerk/sctp/src/netinet/sctp_userspace.c b/netwerk/sctp/src/netinet/sctp_userspace.c
index 71888901f..8e283581b 100755
--- a/netwerk/sctp/src/netinet/sctp_userspace.c
+++ b/netwerk/sctp/src/netinet/sctp_userspace.c
@@ -84,8 +84,13 @@ void
 sctp_userspace_set_threadname(const char *name)
 {
 #if defined(__APPLE__)
+#if(1)
+	/* TenFourFox: no pthread_setname_np in Tiger */
+	return;
+#else
 	pthread_setname_np(name);
 #endif
+#endif
 #if defined(__linux__)
 	prctl(PR_SET_NAME, name);
 #endif
diff --git a/netwerk/sctp/src/user_atomic.h b/netwerk/sctp/src/user_atomic.h
index 6a59587ef..9f0ac0f82 100755
--- a/netwerk/sctp/src/user_atomic.h
+++ b/netwerk/sctp/src/user_atomic.h
@@ -54,7 +54,9 @@
 #define atomic_add_int(addr, val) OSAtomicAdd32Barrier(val, (int32_t *)addr)
 #define atomic_fetchadd_int(addr, val) OSAtomicAdd32Barrier(val, (int32_t *)addr)
 #define atomic_subtract_int(addr, val) OSAtomicAdd32Barrier(-val, (int32_t *)addr)
-#define atomic_cmpset_int(dst, exp, src) OSAtomicCompareAndSwapIntBarrier(exp, src, (int *)dst)
+/* TenFourFox */
+#define atomic_cmpset_int(dst, exp, src) OSAtomicCompareAndSwap32Barrier(exp, src, (int *)dst)
+//#define atomic_cmpset_int(dst, exp, src) OSAtomicCompareAndSwapIntBarrier(exp, src, (int *)dst)
 #define SCTP_DECREMENT_AND_CHECK_REFCOUNT(addr) (atomic_fetchadd_int(addr, -1) == 0)
 #endif
 
diff --git a/netwerk/sctp/src/user_environment.c b/netwerk/sctp/src/user_environment.c
index 3deb3ef0d..c0b87b518 100755
--- a/netwerk/sctp/src/user_environment.c
+++ b/netwerk/sctp/src/user_environment.c
@@ -132,8 +132,23 @@ init_random(void)
 void
 read_random(void *buf, size_t size)
 {
+/* TenFourFox: no arc4random_buf in Tiger.
+   This isn't used much, so substitute a secure, if suboptimal, alternate. */
+#if(0)
 	arc4random_buf(buf, size);
 	return;
+#else
+	size_t i;
+	char *c = (char *)buf;
+	for(i=0; i<size; i++) {
+		/* arc4random returns int, not char. Ass-U-ME that entropy
+		   is evenly distributed throughout the return value, so just
+		   take the lower 8 bits in case size is not a integral number
+		   of ints. */
+		c[i] = (arc4random() & 0xff);
+	}
+	return;
+#endif
 }
 
 void