diff --git a/module/Kbuild.in b/module/Kbuild.in
index 95313c984..e653908ef 100644
--- a/module/Kbuild.in
+++ b/module/Kbuild.in
@@ -2,7 +2,7 @@
 # first.  This ensures its module initialization function is run before
 # any of the other module initialization functions which depend on it.
 
-ZFS_MODULE_CFLAGS += -std=gnu99 -Wno-declaration-after-statement
+ZFS_MODULE_CFLAGS += -std=gnu11 -Wno-declaration-after-statement
 ZFS_MODULE_CFLAGS += -Wmissing-prototypes
 ZFS_MODULE_CFLAGS += @KERNEL_DEBUG_CFLAGS@ @KERNEL_NO_FORMAT_ZERO_LENGTH@