diff --git a/blame.c b/blame.c
index 76712b5962bcb0f511cc4a18766d1a45dc901675..7099b53c72dd3d4f586b6ae4ba7583738225523c 100644
--- a/blame.c
+++ b/blame.c
@@ -20,7 +20,7 @@
 
 #define DEBUG 0
 
-static const char blame_usage[] = "[-c] [-l] [-t] [-S <revs-file>] [--] file [commit]\n"
+static const char blame_usage[] = "git-blame [-c] [-l] [-t] [-S <revs-file>] [--] file [commit]\n"
 	"  -c, --compatibility Use the same output mode as git-annotate (Default: off)\n"
 	"  -l, --long          Show long commit SHA1 (Default: off)\n"
 	"  -t, --time          Show raw timestamp (Default: off)\n"
diff --git a/builtin-diff.c b/builtin-diff.c
index cb4216eb8a81ac5263337018272043d673d59977..1075855102fdb9d49f923edc4b62ddb75aa8027c 100644
--- a/builtin-diff.c
+++ b/builtin-diff.c
@@ -23,7 +23,7 @@ struct blobinfo {
 };
 
 static const char builtin_diff_usage[] =
-"diff <options> <rev>{0,2} -- <path>*";
+"git-diff <options> <rev>{0,2} -- <path>*";
 
 static int builtin_diff_files(struct rev_info *revs,
 			      int argc, const char **argv)
diff --git a/builtin-push.c b/builtin-push.c
index c39dd1e092def752d6935752362421abf35bfef1..53bc378f73e752a58542a1fb8b9ddedcf9301acf 100644
--- a/builtin-push.c
+++ b/builtin-push.c
@@ -8,7 +8,7 @@
 
 #define MAX_URI (16)
 
-static const char push_usage[] = "git push [--all] [--tags] [-f | --force] <repository> [<refspec>...]";
+static const char push_usage[] = "git-push [--all] [--tags] [-f | --force] <repository> [<refspec>...]";
 
 static int all = 0, tags = 0, force = 0, thin = 1;
 static const char *execute = NULL;
diff --git a/mktag.c b/mktag.c
index 09b6e437d46a71b0123b5cb791cc537cf946e7a1..be23e589fbf504cb165abc3b97bdf5adb7317f68 100644
--- a/mktag.c
+++ b/mktag.c
@@ -123,7 +123,7 @@ int main(int argc, char **argv)
 	unsigned char result_sha1[20];
 
 	if (argc != 1)
-		usage("cat <signaturefile> | git-mktag");
+		usage("git-mktag < signaturefile");
 
 	setup_git_directory();
 
diff --git a/mktree.c b/mktree.c
index ab63cd99d4ae41310b97811cf738803afe16ff1f..9a6f0d2f6b0be1307985b4bd56d0bc84abd1df02 100644
--- a/mktree.c
+++ b/mktree.c
@@ -71,7 +71,7 @@ static void write_tree(unsigned char *sha1)
 	write_sha1_file(buffer, offset, tree_type, sha1);
 }
 
-static const char mktree_usage[] = "mktree [-z]";
+static const char mktree_usage[] = "git-mktree [-z]";
 
 int main(int ac, char **av)
 {