diff --git a/src/lib/core/fiber.c b/src/lib/core/fiber.c
index abd6c6b11ce2cc83c6428cb51621bf20df53b41b..c9813ba210c12830286cdfcc371ca5920ef0b8f4 100644
--- a/src/lib/core/fiber.c
+++ b/src/lib/core/fiber.c
@@ -95,7 +95,7 @@ enum {
 	/* The minimum allowable fiber stack size in bytes */
 	FIBER_STACK_SIZE_MINIMAL = 16384,
 	/* Default fiber stack size in bytes */
-	FIBER_STACK_SIZE_DEFAULT = 65536
+	FIBER_STACK_SIZE_DEFAULT = 524288,
 };
 
 /** Default fiber attributes */