@@ -639,11 +639,11 @@
 	    "xorl	%0, %0\n\t"
 	    "lock\n\t"
 	    "cmpxchg	%2, %3\n\t"
 	    "sete	%b0\n\t"
 	    "movzbl	%b0, %0"
-	    : "=&r"(r)
+	    : "=&d"(r)	/* use d instead of r due to gcc bug */
 	    : "a"(o), "r"(n), "m"(*p)
 	);
 
 	return r;
 #elif defined(OF_HAVE_GCC_ATOMIC_OPS)
@@ -670,11 +670,11 @@
 	    "xorl	%0, %0\n\t"
 	    "lock\n\t"
 	    "cmpxchg	%2, %3\n\t"
 	    "sete	%b0\n\t"
 	    "movzbl	%b0, %0"
-	    : "=&r"(r)
+	    : "=&d"(r)	/* use d instead of r due to gcc bug */
 	    : "a"(o), "r"(n), "m"(*p)
 	);
 
 	return r;
 #elif defined(OF_HAVE_GCC_ATOMIC_OPS)
@@ -701,11 +701,11 @@
 	    "xorl	%0, %0\n\t"
 	    "lock\n\t"
 	    "cmpxchg	%2, %3\n\t"
 	    "sete	%b0\n\t"
 	    "movzbl	%b0, %0"
-	    : "=&r"(r)
+	    : "=&d"(r)	/* use d instead of r due to gcc bug */
 	    : "a"(o), "r"(n), "m"(*p)
 	);
 
 	return r;
 #elif defined(OF_HAVE_GCC_ATOMIC_OPS)