diff --git a/target/linux/ath25/config-4.9 b/target/linux/ath25/config-4.9
index de771de519..aae77a456e 100644
--- a/target/linux/ath25/config-4.9
+++ b/target/linux/ath25/config-4.9
@@ -79,6 +79,7 @@ CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
 CONFIG_HAVE_FUNCTION_TRACER=y
 CONFIG_HAVE_GENERIC_DMA_COHERENT=y
 CONFIG_HAVE_IDE=y
+CONFIG_HAVE_IRQ_EXIT_ON_IRQ_STACK=y
 CONFIG_HAVE_IRQ_TIME_ACCOUNTING=y
 CONFIG_HAVE_LATENCYTOP_SUPPORT=y
 CONFIG_HAVE_MEMBLOCK=y