diff --git a/nmap.cc b/nmap.cc
index 2d87aea7c..b4851732f 100644
--- a/nmap.cc
+++ b/nmap.cc
@@ -599,7 +599,7 @@ void parse_options(int argc, char **argv) {
     {"oS", required_argument, 0, 0},
     {"oH", required_argument, 0, 0},
     {"oX", required_argument, 0, 0},
-    {"iL", required_argument, 0, 'i'},
+    {"iL", required_argument, 0, 0},
     {"iR", required_argument, 0, 0},
     {"sI", required_argument, 0, 0},
     {"source_port", required_argument, 0, 'g'},
@@ -942,6 +942,18 @@ void parse_options(int argc, char **argv) {
           exit(0);
         } else if (strcmp(long_options[option_index].name, "badsum") == 0) {
           o.badsum = 1;
+        } else if (strcmp(long_options[option_index].name, "iL") == 0) {
+          if (o.inputfd) {
+            fatal("Only one input filename allowed");
+          }
+          if (!strcmp(optarg, "-")) {
+            o.inputfd = stdin;
+          } else {
+            o.inputfd = fopen(optarg, "r");
+            if (!o.inputfd) {
+              fatal("Failed to open input file %s for reading", optarg);
+            }
+          }
         } else if (strcmp(long_options[option_index].name, "iR") == 0) {
           o.generate_random_ips = 1;
           o.max_ips_to_scan = strtoul(optarg, &endptr, 10);