--- a/memory/build/mozjemalloc.cpp
+++ b/memory/build/mozjemalloc.cpp
@@ -329,30 +329,24 @@ static pthread_key_t tlsIndex;
 
 /* Minimum alignment of non-tiny allocations is 2^QUANTUM_2POW_MIN bytes. */
 #  define QUANTUM_2POW_MIN      4
 #if defined(_WIN64) || defined(__LP64__)
 #  define SIZEOF_PTR_2POW       3
 #else
 #  define SIZEOF_PTR_2POW       2
 #endif
-#define PIC
 
 #define	SIZEOF_PTR		(1U << SIZEOF_PTR_2POW)
 
 /* sizeof(int) == (1U << SIZEOF_INT_2POW). */
 #ifndef SIZEOF_INT_2POW
 #  define SIZEOF_INT_2POW	2
 #endif
 
-/* We can't use TLS in non-PIC programs, since TLS relies on loader magic. */
-#if (!defined(PIC) && !defined(NO_TLS))
-#  define NO_TLS
-#endif
-
 /*
  * Size and alignment of memory chunks that are allocated by the OS's virtual
  * memory system.
  */
 #define	CHUNK_2POW_DEFAULT	20
 /* Maximum number of dirty pages per arena. */
 #define	DIRTY_MAX_DEFAULT	(1U << 8)