diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 80365d8cd15..0d28c5f78ff 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -32634,7 +32634,7 @@ comparison is unordered.
 
 @item -m80387
 @itemx -mhard-float
-@opindex 80387
+@opindex m80387
 @opindex mhard-float
 Generate output containing 80387 instructions for floating point.