Index: libcfa/src/bits/defs.hfa
===================================================================
--- libcfa/src/bits/defs.hfa	(revision 30763fd9998ec2cdcee134d9878da68c14888f24)
+++ libcfa/src/bits/defs.hfa	(revision b798713f34d313e4f132850f1f6d89bdc4947d8b)
@@ -54,5 +54,5 @@
 }
 
-#define __CFA_NO_BIT_TEST_AND_SET__
+// #define __CFA_NO_BIT_TEST_AND_SET__
 
 static inline bool bts(volatile unsigned long long int * target, unsigned long long int bit ) {
@@ -65,5 +65,5 @@
         asm volatile(
             "LOCK btsq %[bit], %[target]\n\t"
-            :"=@ccc" (result)
+            : "=@ccc" (result)
             : [target] "m" (*target), [bit] "r" (bit)
         );