diff --git a/samples/subsys/fs/fat_fs/prj.conf b/samples/subsys/fs/fat_fs/prj.conf
index 6dc8a77032e..f7a3bdfc007 100644
--- a/samples/subsys/fs/fat_fs/prj.conf
+++ b/samples/subsys/fs/fat_fs/prj.conf
@@ -7,3 +7,4 @@ CONFIG_LOG=y
 CONFIG_FILE_SYSTEM=y
 CONFIG_FAT_FILESYSTEM_ELM=y
 CONFIG_PRINTK=y
+CONFIG_MAIN_STACK_SIZE=2048