diff --git a/tools/pci/pcitest.c b/tools/pci/pcitest.c
index ad54a58d7dda0e82f3bb46f95e6a5f9af8c9a42e..9074b477bff0fad4dfddf71a85b2b51bd0003114 100644
--- a/tools/pci/pcitest.c
+++ b/tools/pci/pcitest.c
@@ -173,6 +173,7 @@ int main(int argc, char **argv)
 			"\t-D <dev>		PCI endpoint test device {default: /dev/pci-endpoint-test.0}\n"
 			"\t-b <bar num>		BAR test (bar number between 0..5)\n"
 			"\t-m <msi num>		MSI test (msi number between 1..32)\n"
+			"\t-l			Legacy IRQ test\n"
 			"\t-r			Read buffer test\n"
 			"\t-w			Write buffer test\n"
 			"\t-c			Copy buffer test\n"