diff --git a/src/main/kotlin/org/tokend/wallet/utils/SecureCharArrayWriter.kt b/src/main/kotlin/org/tokend/wallet/utils/SecureCharArrayWriter.kt
index 18d47d4..57e09a0 100644
--- a/src/main/kotlin/org/tokend/wallet/utils/SecureCharArrayWriter.kt
+++ b/src/main/kotlin/org/tokend/wallet/utils/SecureCharArrayWriter.kt
@@ -72,8 +72,8 @@ class SecureCharArrayWriter(initialSize: Int) : CharArrayWriter(initialSize) {
      * Erases the buffer and resets chars count to 0.
      */
     fun erase() {
-        super.close()
+        close()
         buf.erase()
-        count = 0
+        reset()
     }
 }
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