Index: uspace/lib/c/include/fibril.h
===================================================================
--- uspace/lib/c/include/fibril.h	(revision b4df8db46336b1d3a612064e87644b1698115b9c)
+++ uspace/lib/c/include/fibril.h	(revision 7c10198d390820dc1fcb46744f0585f3bf1fb8b6)
@@ -86,6 +86,8 @@
 extern void context_restore(context_t *ctx) __attribute__((noreturn));
 
+#define FIBRIL_DFLT_STK_SIZE	0
+
 #define fibril_create(func, arg) \
-	fibril_create_generic((func), (arg), (size_t) -1)
+	fibril_create_generic((func), (arg), FIBRIL_DFLT_STK_SIZE)
 extern fid_t fibril_create_generic(int (*func)(void *), void *arg, size_t);
 extern void fibril_destroy(fid_t fid);