diff --git a/examples/clbff.v b/examples/clbff.v
index 481ca6503..d3ea02201 100644
--- a/examples/clbff.v
+++ b/examples/clbff.v
@@ -23,7 +23,7 @@
  *
  * To compile this for XNF, try a command like this:
  *
- *    iverilog -txnf -fpart=XC4010XLPQ160 -fncf=clbff.ncf -oclbff.xnf clbff.v
+ *    iverilog -txnf -ppart=XC4010XLPQ160 -pncf=clbff.ncf -oclbff.xnf clbff.v
  *
  * That command causes an clbff.xnf and clbff.ncf file to be created.
  * Next, make the clbff.ngd file with the command:
diff --git a/examples/outff.v b/examples/outff.v
index 8ff4ca860..9ecd56acb 100644
--- a/examples/outff.v
+++ b/examples/outff.v
@@ -23,7 +23,7 @@
  *
  * To compile this for XNF, try a command like this:
  *
- *    iverilog -txnf -fpart=XC4010XLPQ160 -ooutff.xnf -fncf=outff.ncf outff.v
+ *    iverilog -txnf -ppart=XC4010XLPQ160 -ooutff.xnf -pncf=outff.ncf outff.v
  *
  * That command causes an outff.xnf and outff.ncf file to be created.
  * Next, make the outff.ngd file with the command:
diff --git a/examples/pal_reg.v b/examples/pal_reg.v
index 170478814..a3731a5f8 100644
--- a/examples/pal_reg.v
+++ b/examples/pal_reg.v
@@ -23,7 +23,7 @@
  * pin assignments locked down by design. The command to compile this
  * into a jedec file is;
  *
- *   iverilog -tpal -fpart=generic-22v10-plcc -opal_reg.jed pal_reg.v
+ *   iverilog -tpal -ppart=generic-22v10-plcc -opal_reg.jed pal_reg.v
  *
  * The output file name (passed through the -o<file> switch) can be
  * any file you desire. If the compilation and fittin all succeed, the