diff --git a/tcx/src/handler.rs b/tcx/src/handler.rs
index 53e43446..b222d51b 100644
--- a/tcx/src/handler.rs
+++ b/tcx/src/handler.rs
@@ -556,7 +556,12 @@ pub(crate) fn keystore_common_exists(data: &[u8]) -> Result<Vec<u8>> {
         KeystoreCommonExistsParam::decode(data).expect("keystore_common_exists params");
     let key_hash: String;
     if param.r#type == KeyType::Mnemonic as i32 {
-        key_hash = key_hash_from_mnemonic(&param.value)?;
+        let mnemonic: &str = &param
+            .value
+            .split_whitespace()
+            .collect::<Vec<&str>>()
+            .join(" ");
+        key_hash = key_hash_from_mnemonic(mnemonic)?;
     } else {
         if param.encoding.eq("TEZOS") {
             key_hash = key_hash_from_tezos_format_pk(&param.value)?;
diff --git a/tcx/src/lib.rs b/tcx/src/lib.rs
index 47e9e95b..ad809ffe 100644
--- a/tcx/src/lib.rs
+++ b/tcx/src/lib.rs
@@ -1567,6 +1567,19 @@ mod tests {
             assert!(result.is_exists);
             assert_eq!(result.id, wallet.id);
 
+            let wallet = import_default_wallet();
+            let param: KeystoreCommonExistsParam = KeystoreCommonExistsParam {
+                r#type: KeyType::Mnemonic as i32,
+                value: format!("{}", " inject  kidney  empty canal shadow  pact comfort  wife crush horse wife sketch  ").to_string(),//Badly formatted mnemonic
+                encoding: "".to_string(),
+            };
+
+            let ret_bytes = call_api("keystore_common_exists", param).unwrap();
+            let result: KeystoreCommonExistsResult =
+                KeystoreCommonExistsResult::decode(ret_bytes.as_slice()).unwrap();
+            assert!(result.is_exists);
+            assert_eq!(result.id, wallet.id);
+
             remove_created_wallet(&wallet.id);
         })
     }