diff --git a/driver/iverilog.man.in b/driver/iverilog.man.in
index 8cad315f3..0f49fea4f 100644
--- a/driver/iverilog.man.in
+++ b/driver/iverilog.man.in
@@ -130,7 +130,7 @@ default, parts of the expression that do not depend on the changed
 input value(s) are not re-evaluated. If an expression contains a call
 to a function that doesn't depend solely on its input values or that
 has side effects, the resulting behavior will differ from that
-required by the standard. Using \fI\-gstrict\-ca\-eval\fP will force
+required by the standard. Using \fB\-gstrict\-ca\-eval\fP will force
 standard compliant behavior (with some loss in performance).
 .TP 8
 .B -gstrict-expr-width\fI|\fP-gno-strict-expr-width