diff --git a/tools/widl/widl.man.in b/tools/widl/widl.man.in
index 5b6e0de1497..0e4baa52c75 100644
--- a/tools/widl/widl.man.in
+++ b/tools/widl/widl.man.in
@@ -114,7 +114,7 @@ prefixed with \fB0x\fR, it will be interpreted as an hexadecimal
 number.  For the meaning of values, see the \fBDebug\fR section.
 .PP
 .B Miscellaneous options:
-.IP "\fB-app_config\f"
+.IP "\fB-app_config\fR"
 Ignored, present for midl compatibility.
 .IP "\fB--local-stubs=\fIfile\fR"
 Generate empty stubs for call_as/local methods in an object interface and