diff --git a/aquatic_http/src/lib/protocol/request.rs b/aquatic_http/src/lib/protocol/request.rs
index bfbbbc6..f1fef56 100644
--- a/aquatic_http/src/lib/protocol/request.rs
+++ b/aquatic_http/src/lib/protocol/request.rs
@@ -142,6 +142,10 @@ impl Request {
                         processed.push(c);
                     }
                 }
+            } else {
+                return Err(anyhow::anyhow!(
+                    "url decode: too few characters in '%{}'", part
+                ))
             }
         }