diff --git a/README.md b/README.md
index c46c93a..fb7926d 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@ Modular status monitor for dwm written in C.
 
 # Usage
 
-`dwmblocks [-d delimiter]`
+`dwmblocks [-d <delimiter>]`
 
 # Modifying blocks
 
@@ -32,8 +32,8 @@ as instructed on the page.
 
 # Signaling changes
 
-To signal a specific block to update, run `sigdwmblocks signal [sigval]`.
-`sigval` is optional and must be an integer. If provided, it is passed as the
+To signal a specific block to update, run `sigdwmblocks <signal> [<sigval>]`.
+`<sigval>` is optional and must be an integer. If provided, it is passed as the
 first argument to the program specified for updating the block.
 
 # xgetrootname
diff --git a/sigdwmblocks.c b/sigdwmblocks.c
index 252e4d2..abeffd2 100644
--- a/sigdwmblocks.c
+++ b/sigdwmblocks.c
@@ -71,6 +71,6 @@ main(int argc, char *argv[])
                 }
         }
 
-        fprintf(stderr, "Usage: %s signal [sigval]\n", argv[0]);
+        fprintf(stderr, "Usage: %s <signal> [<sigval>]\n", argv[0]);
         return 3;
 }