diff --git a/Mk/bsd.options.mk b/Mk/bsd.options.mk
index 38f1492f0dbd..aa7776ecc48c 100644
--- a/Mk/bsd.options.mk
+++ b/Mk/bsd.options.mk
@@ -99,11 +99,11 @@
 #				the CMAKE_ARGS.
 #
 # ${opt}_CMAKE_BOOL		Will add to CMAKE_ARGS:
-#				Option enabled  -D${content}:BOOL=true
-#				Option disabled -D${content}:BOOL=false
+#				Option enabled  -D${content}:BOOL=ON
+#				Option disabled -D${content}:BOOL=OFF
 # ${opt}_CMAKE_BOOL_OFF		Will add to CMAKE_ARGS:
-#				Option enabled  -D${content}:BOOL=false
-#				Option disabled -D${content}:BOOL=true
+#				Option enabled  -D${content}:BOOL=OFF
+#				Option disabled -D${content}:BOOL=ON
 #
 # ${opt}_QMAKE_ON		When option is enabled, it will add its content to
 #				the QMAKE_ARGS.
@@ -519,10 +519,10 @@ CONFIGURE_ARGS+=	${${opt}_CONFIGURE_ENABLE:S/^/--enable-/}
 CONFIGURE_ARGS+=	${${opt}_CONFIGURE_WITH:S/^/--with-/}
 .      endif
 .      if defined(${opt}_CMAKE_BOOL)
-CMAKE_ARGS+=		${${opt}_CMAKE_BOOL:C/.*/-D&:BOOL=true/}
+CMAKE_ARGS+=		${${opt}_CMAKE_BOOL:C/.*/-D&:BOOL=ON/}
 .      endif
 .      if defined(${opt}_CMAKE_BOOL_OFF)
-CMAKE_ARGS+=		${${opt}_CMAKE_BOOL_OFF:C/.*/-D&:BOOL=false/}
+CMAKE_ARGS+=		${${opt}_CMAKE_BOOL_OFF:C/.*/-D&:BOOL=OFF/}
 .      endif
 .      if defined(${opt}_MESON_TRUE)
 MESON_ARGS+=		${${opt}_MESON_TRUE:C/.*/-D&=true/}