diff --git a/scp.c b/scp.c
index 03e4a673..fd842b36 100644
--- a/scp.c
+++ b/scp.c
@@ -1214,8 +1214,8 @@ static const char simh_help[] =
       " The -D switch causes data blob output to also display the data as\n"
       " RADIX-50 characters.\n"
       "5-F\n"
-      " The -F switch causes duplicate successive lines of debug to be\n"
-      " summarized to reduce noise from the debug data stream.\n"
+      " The -F switch causes duplicate successive lines of debug NOT to be\n"
+      " summarized to reduce repetative noise from the debug data stream.\n"
       "5-E\n"
       " The -E switch causes data blob output to also display the data as\n"
       " EBCDIC characters.\n"
diff --git a/sim_console.c b/sim_console.c
index f23f5635..68b13334 100644
--- a/sim_console.c
+++ b/sim_console.c
@@ -2260,7 +2260,7 @@ if (!sim_quiet) {
     if (sim_deb_switches & SWMASK ('A'))
         sim_printf ("   Debug messages display time of day as seconds.msec%s\n", sim_deb_switches & SWMASK ('R') ? " relative to the start of debugging" : "");
     if (sim_deb_switches & SWMASK ('F'))
-        sim_printf ("   Debug messages will be filtered to summarize duplicate lines\n");
+        sim_printf ("   Debug messages will not be filtered to summarize duplicate lines\n");
     if (sim_deb_switches & SWMASK ('E'))
         sim_printf ("   Debug messages containing blob data in EBCDIC will display in readable form\n");
     time(&now);
@@ -2307,7 +2307,7 @@ if (sim_deb) {
     if (sim_deb_switches & SWMASK ('A'))
         fprintf (st, "   Debug messages display time of day as seconds.msec%s\n", sim_deb_switches & SWMASK ('R') ? " relative to the start of debugging" : "");
     if (sim_deb_switches & SWMASK ('F'))
-        fprintf (st, "   Debug messages will be filtered to summarize duplicate lines\n");
+        fprintf (st, "   Debug messages are not being filtered to summarize duplicate lines\n");
     if (sim_deb_switches & SWMASK ('E'))
         fprintf (st, "   Debug messages containing blob data in EBCDIC will display in readable form\n");
     for (i = 0; (dptr = sim_devices[i]) != NULL; i++) {