diff --git a/conf/machine/am335x-evm.conf b/conf/machine/am335x-evm.conf
index 3b36cef0..841e4d20 100644
--- a/conf/machine/am335x-evm.conf
+++ b/conf/machine/am335x-evm.conf
@@ -26,7 +26,7 @@ SERIAL_CONSOLES_CHECK = "${SERIAL_CONSOLES}"
 # UBI: logical eraseblock size:    126976 bytes
 # from ubiattach stdout:
 # UBI device number 0, total 1988 LEBs
-MKUBIFS_ARGS = "-F -m 2048 -e 126976 -c 6000"
+MKUBIFS_ARGS = "-F -m 2048 -e 126976 -c 6200"
 
 # do ubiattach /dev/ubi_ctrl -m 7 -O 2048
 # from dmesg:
diff --git a/conf/machine/am437x-evm.conf b/conf/machine/am437x-evm.conf
index 142280e0..98af5ecd 100644
--- a/conf/machine/am437x-evm.conf
+++ b/conf/machine/am437x-evm.conf
@@ -26,7 +26,7 @@ SERIAL_CONSOLES_CHECK = "${SERIAL_CONSOLES}"
 # UBI: logical eraseblock size:    253952 bytes
 # from ubiattach stdout:
 # UBI device number 0, total 994 LEBs
-MKUBIFS_ARGS = "-F -m 4096 -e 253952 -c 2800"
+MKUBIFS_ARGS = "-F -m 4096 -e 253952 -c 4000"
 
 # do ubiattach /dev/ubi_ctrl -m 11 -O 4096
 # from dmesg: