diff --git a/src/cli.rs b/src/cli.rs
index 0cde41f..9ff64c6 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -125,7 +125,7 @@ pub fn parse_args_from(mut args: Vec<OsString>) -> crate::Result<ParsedArgs> {
                     return Err(Error::CompressionTypo);
                 }
             } else {
-                todo!("Complain that no decompression arguments were given.");
+                return Err(Error::MissingArgumentsForDecompression);
             }
 
             // Parse flags
diff --git a/src/error.rs b/src/error.rs
index 0169fed..45beaae 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -27,6 +27,7 @@ pub enum Error {
     OofError(oof::OofError),
     CompressingRootFolder,
     MissingArgumentsForCompression,
+    MissingArgumentsForDecompression,
     CompressionTypo,
     WalkdirError { reason: String },
 }
@@ -130,6 +131,17 @@ impl fmt::Display for Error {
 
                 error
             }
+            Error::MissingArgumentsForDecompression => {
+                let error = FinalError::with_title("Could not decompress")
+                    .detail("The compress command requires at least one argument")
+                    .hint("You must provide:")
+                    .hint("  - At least one input argument.")
+                    .hint("")
+                    .hint("Example: `ouch decompress imgs.tar.gz`")
+                    .to_owned();
+
+                error
+            }
             Error::InternalError => {
                 let error = FinalError::with_title("InternalError :(")
                     .detail("This should not have happened")