diff --git a/Makefile.rules b/Makefile.rules
index 89c5fc1137..9a97373a55 100644
--- a/Makefile.rules
+++ b/Makefile.rules
@@ -37,6 +37,9 @@ endif
 
 OPTIMIZE?=-O6
 ifneq ($(findstring darwin,$(OSARCH)),)
+  ifeq ($(shell /usr/bin/sw_vers -productVersion | cut -c1-4),10.4)
+    OPTIMIZE+=-fno-inline
+  endif
   ifeq ($(shell /usr/bin/sw_vers -productVersion | cut -c1-4),10.6)
     # Snow Leopard has an issue with this optimization flag on large files (like chan_sip)
     OPTIMIZE+=-fno-inline-functions