diff --git a/ChangeLog b/ChangeLog
index 1aefa5c..af264e2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2020-12-20  Dmitry V. Levin  <ldv@altlinux.org>
+
+	* doc/config.guess.x: Fix typo.
+
 2020-12-02  Dmitry V. Levin  <ldv@altlinux.org>
 
 	* config.sub (thumbv7*): Recognize.
diff --git a/doc/config.guess.x b/doc/config.guess.x
index 83fcdd2..6cce1f5 100644
--- a/doc/config.guess.x
+++ b/doc/config.guess.x
@@ -6,7 +6,7 @@ config.guess might need to compile and run C code, hence it needs a
 compiler for the `build' machine: use the environment variable
 `CC_FOR_BUILD' to specify the compiler for the build machine.  If
 `CC_FOR_BUILD' is not specified, `CC' will be used.  Be sure to
-specify `CC_FOR_BUILD' is `CC' is a cross-compiler to the `host'
+specify `CC_FOR_BUILD' if `CC' is a cross-compiler to the `host'
 machine.
 
   CC_FOR_BUILD    a native C compiler, defaults to `cc'