Index: Mk/Uses/cmake.mk
===================================================================
--- Mk/Uses/cmake.mk
+++ Mk/Uses/cmake.mk
@@ -14,7 +14,7 @@
 # User defined variables:
 # CMAKE_NOCOLOR		- Disable colour build output
 #			Default: not set, unless BATCH or PACKAGE_BUILDING is defined
-# CMAKE_NINJA		- Use ninja instead of make(1)
+# CMAKE_NO_NINJA	- Don't use ninja instead of make(1)
 #
 # Variables for ports:
 # CMAKE_ARGS		- Arguments passed to cmake
@@ -91,7 +91,7 @@
 CMAKE_ARGS+=		-DCMAKE_COLOR_MAKEFILE:BOOL=OFF
 .endif
 
-.if defined(CMAKE_NINJA)
+.if !defined(CMAKE_NO_NINJA)
 .include "${USESDIR}/ninja.mk"
 .endif