From: David Mandelin <dmandelin@mozilla.com>

diff --git a/memory/jemalloc/jemalloc.c b/memory/jemalloc/jemalloc.c
--- a/memory/jemalloc/jemalloc.c
+++ b/memory/jemalloc/jemalloc.c
@@ -5792,24 +5792,24 @@ __attribute__((noinline))
 #else
 inline
 #endif
 void *
 memalign(size_t alignment, size_t size)
 {
 	void *ret;
 
-	assert(((alignment - 1) & alignment) == 0 && alignment >=
-	    sizeof(void *));
+	assert(((alignment - 1) & alignment) == 0);
 
 	if (malloc_init()) {
 		ret = NULL;
 		goto RETURN;
 	}
 
+	alignment = alignment < sizeof(void*) ? sizeof(void*) : alignment;
 	ret = ipalloc(alignment, size);
 
 RETURN:
 #ifdef MALLOC_XMALLOC
 	if (opt_xmalloc && ret == NULL) {
 		_malloc_message(_getprogname(),
 		": (malloc) Error in memalign(): out of memory\n", "", "");
 		abort();