diff --git a/crunch/crn_decomp.h b/crunch/crn_decomp.h
index 381051e..41dde01 100644
--- a/crunch/crn_decomp.h
+++ b/crunch/crn_decomp.h
@@ -341,6 +341,8 @@ const unsigned int cCRNHeaderMinSize = 62U;
 #include <stdlib.h>
 #ifdef WIN32
 #include <memory.h>
+#elif defined __APPLE__
+#include <malloc/malloc.h>
 #else
 #include <malloc.h>
 #endif
@@ -402,6 +404,8 @@ typedef uint64 ptr_bits;
 #else
 #ifdef __x86_64__
 typedef uint64 ptr_bits;
+#elif defined __APPLE__
+typedef uint64 ptr_bits;
 #else
 typedef uint32 ptr_bits;
 #endif