diff --git a/sys/arm/conf/SAM9X25EK b/sys/arm/conf/SAM9X25EK
index a9bf42cb6298..e65ce81d0e6d 100644
--- a/sys/arm/conf/SAM9X25EK
+++ b/sys/arm/conf/SAM9X25EK
@@ -38,7 +38,7 @@ options 	FFS			#Berkeley Fast Filesystem
 #options 	UFS_ACL			#Support for access control lists
 #options 	UFS_DIRHASH		#Improve performance on big directories
 #options 	MD_ROOT			#MD is a potential root device
-#options 	MD_ROOT_SIZE=4096	# 3MB ram disk
+#options 	MD_ROOT_SIZE=4096	# 4MB ram disk
 options 	NFSCL			#New Network Filesystem Client
 #options 	NFSD			#New Network Filesystem Server
 #options 	NFSLOCKD		#Network Lock Manager