Index: src/threading.h
==================================================================
--- src/threading.h
+++ src/threading.h
@@ -202,11 +202,13 @@
 static OF_INLINE bool
 of_spinlock_lock(of_spinlock_t *spinlock)
 {
 #if defined(OF_HAVE_ATOMIC_OPS)
 # if defined(OF_HAVE_SCHED_YIELD) || defined(OF_WINDOWS)
-	for (size_t i = 0; i < OF_SPINCOUNT; i++)
+	size_t i;
+
+	for (i = 0; i < OF_SPINCOUNT; i++)
 		if (of_spinlock_trylock(spinlock))
 			return true;
 
 	while (!of_spinlock_trylock(spinlock))
 #  ifndef OF_WINDOWS