diff --git a/mozilla/gc/boehm/MacOS.c b/mozilla/gc/boehm/MacOS.c
index 71009c47dfc..7836d0d31d5 100644
--- a/mozilla/gc/boehm/MacOS.c
+++ b/mozilla/gc/boehm/MacOS.c
@@ -25,6 +25,15 @@ unloading shared library.
 #include "gc.h"
 #include "gc_priv.h"
 
+void GC_init_MacOS()
+{
+    int i;
+    
+    MaxApplZone();
+    for (i = 0; i < 8; ++i)
+        MoreMasters();
+}
+
 // use 'CODE' resource 0 to get exact location of the beginning of global space.
 
 typedef struct {
diff --git a/mozilla/gc/boehm/misc.c b/mozilla/gc/boehm/misc.c
index 08794e3e119..ec68d02aa9e 100644
--- a/mozilla/gc/boehm/misc.c
+++ b/mozilla/gc/boehm/misc.c
@@ -405,6 +405,10 @@ void GC_init()
 
 }
 
+#ifdef MACOS
+    extern void GC_init_MacOS();
+#endif
+
 #ifdef MSWIN32
     extern void GC_init_win32();
 #endif
@@ -425,6 +429,9 @@ void GC_init_inner()
 	    GC_printf0("Reordering linker, didn't exclude obj_kinds\n");
 	}
 #   endif
+#   ifdef MACOS
+    GC_init_MacOS();
+#   endif
 #   ifdef MSWIN32
  	GC_init_win32();
 #   endif