diff --git a/grc/decoding/gsm_tch_f_decoder.xml b/grc/decoding/gsm_tch_f_decoder.xml
index 632162f..b15d55f 100644
--- a/grc/decoding/gsm_tch_f_decoder.xml
+++ b/grc/decoding/gsm_tch_f_decoder.xml
@@ -59,7 +59,7 @@
   <param>
     <name>Voice boundary detection</name>
     <key>boundary_check</key>
-    <value>True</value>
+    <value>False</value>
     <type>bool</type>
     <option>
       <name>False</name>
diff --git a/include/grgsm/decoding/tch_f_decoder.h b/include/grgsm/decoding/tch_f_decoder.h
index 18a1baa..53f10bd 100644
--- a/include/grgsm/decoding/tch_f_decoder.h
+++ b/include/grgsm/decoding/tch_f_decoder.h
@@ -62,7 +62,7 @@
        * class. gsm::tch_f_decoder::make is the public interface for
        * creating new instances.
        */
-      static sptr make(tch_mode mode, const std::string &file, bool boundary_check=true);
+      static sptr make(tch_mode mode, const std::string &file, bool boundary_check=false);
 
     };