diff --git a/README.md b/README.md
index 589ab7a9..e492b083 100644
--- a/README.md
+++ b/README.md
@@ -136,6 +136,7 @@ Compression tools:
                                    - tz:    Test Zone Search
                                    - full:  Full Search
                                    - full8, full16, full32, full64
+                                   - dia:   Diamond Search
       --subme <integer>      : Set fractional pixel motion estimation level
                                    - 0: only integer motion estimation
                                    - 1: + 1/2-pixel horizontal and vertical
diff --git a/src/cli.c b/src/cli.c
index ff65a030..9040fd3d 100644
--- a/src/cli.c
+++ b/src/cli.c
@@ -430,6 +430,7 @@ void print_help(void)
     "                                   - tz:    Test Zone Search\n"
     "                                   - full:  Full Search\n"
     "                                   - full8, full16, full32, full64\n"
+    "                                   - dia:   Diamond Search\n"
     "      --subme <integer>      : Set fractional pixel motion estimation level\n"
     "                                   - 0: only integer motion estimation\n"
     "                                   - 1: + 1/2-pixel horizontal and vertical\n"