--- a/memory/mozjemalloc/mozjemalloc.cpp
+++ b/memory/mozjemalloc/mozjemalloc.cpp
@@ -187,20 +187,16 @@ getenv(const char *name)
 
 	if (GetEnvironmentVariableA(name, (LPSTR)&mozillaMallocOptionsBuf,
 		    sizeof(mozillaMallocOptionsBuf)) > 0)
 		return (mozillaMallocOptionsBuf);
 
 	return (NULL);
 }
 
-typedef unsigned char uint8_t;
-typedef unsigned uint32_t;
-typedef unsigned long long uint64_t;
-typedef unsigned long long uintmax_t;
 #if defined(_WIN64)
 typedef long long ssize_t;
 #else
 typedef long ssize_t;
 #endif
 
 #define	MALLOC_DECOMMIT
 #endif