diff --git a/sys/boot/Makefile b/sys/boot/Makefile
index ad7f32b25eaf..8dbf1b1f95a3 100644
--- a/sys/boot/Makefile
+++ b/sys/boot/Makefile
@@ -5,25 +5,25 @@
 .endif
 
 .if !defined(NOFORTH)
-# Build the add-in FORTH interpreter
+# Build the add-in FORTH interpreter.
 SUBDIR+=		ficl
 .endif
 
-# Build OpenFirmware library
+# Build OpenFirmware library.
 .if ${MACHINE_ARCH} == "powerpc" || ${MACHINE_ARCH} == "sparc64"
 SUBDIR+=		ofw
 .endif
 
-# Pick the machine-dependant subdir based on the target architecture.
+# Pick the machine-dependent subdir based on the target architecture.
 SUBDIR+=		${MACHINE}
 
 # Build ARC / AlphaBIOS executable on the Alpha
-# (this is a WIP (work in progress))
+# (this is a WIP (work in progress)).
 #.if ${MACHINE_ARCH} == "alpha"
 #SUBDIR+=		arc
 #.endif
 
-# Build EFI executable on ia64
+# Build EFI executable on ia64.
 .if ${MACHINE_ARCH} == "ia64"
 SUBDIR+=		efi
 .endif