diff --git a/cc/config/clang.go b/cc/config/clang.go
index 832689b..6a1c736 100644
--- a/cc/config/clang.go
+++ b/cc/config/clang.go
@@ -97,7 +97,7 @@
 	pctx.StaticVariable("ClangExtraCflags", strings.Join([]string{
 		"-D__compiler_offsetof=__builtin_offsetof",
 
-		// -Wimplicit fallthrough is not enabled by -Wall.
+		// -Wimplicit-fallthrough is not enabled by -Wall.
 		"-Wimplicit-fallthrough",
 
 		// Help catch common 32/64-bit errors.