diff --git a/conf/machine/am37x-evm.conf b/conf/machine/am37x-evm.conf
index e4170f4e..ddb54e86 100644
--- a/conf/machine/am37x-evm.conf
+++ b/conf/machine/am37x-evm.conf
@@ -16,7 +16,7 @@ require conf/machine/include/omap3.inc
 
 # Ship all kernel modules
 
-IMAGE_FSTYPES ?= "jffs2 tar.bz2"
+IMAGE_FSTYPES += "jffs2 tar.bz2"
 EXTRA_IMAGECMD_jffs2 = "-lnp -e 0x20000 -s 2048"
 
 SERIAL_CONSOLE = "115200 ttyS0"