diff --git a/libs/sdk-common/src/input_parser.rs b/libs/sdk-common/src/input_parser.rs
index 84061fc89..676279a8a 100644
--- a/libs/sdk-common/src/input_parser.rs
+++ b/libs/sdk-common/src/input_parser.rs
@@ -634,7 +634,7 @@ impl BitcoinAddressData {
                     .map(|(key, value)| format!("{key}={value}"))
                     .collect::<Vec<String>>()
                     .join("&");
-                Ok(format!("{scheme}:{}{suffix_str}", self.address))
+                Ok(format!("{scheme}:{}?{suffix_str}", self.address))
             }
         }
     }
diff --git a/libs/sdk-common/src/liquid/bip21.rs b/libs/sdk-common/src/liquid/bip21.rs
index 2b5e1a603..9a509b11e 100644
--- a/libs/sdk-common/src/liquid/bip21.rs
+++ b/libs/sdk-common/src/liquid/bip21.rs
@@ -65,7 +65,7 @@ impl LiquidAddressData {
                     .collect::<Vec<String>>()
                     .join("&");
 
-                Ok(format!("{scheme}:{}{suffix_str}", self.address))
+                Ok(format!("{scheme}:{}?{suffix_str}", self.address))
             }
         }
     }