diff --git a/src/ts/wf/foutra.cc b/src/ts/wf/foutra.cc
index 042cfc99b2fa052d1d81d1e488799a2dcc97a8db..f77d473f97b4429b380a3a9fc672fb376cbbc7bf 100644
--- a/src/ts/wf/foutra.cc
+++ b/src/ts/wf/foutra.cc
@@ -52,6 +52,7 @@
  *                        opt.scaledecades rather than opt.decades
  *  - 29/01/2015   V1.11  FEATURE: provide calculation of n-th derivative
  *                        of time series
+ *  - 02/04/2019          use new header file interface to libtsioxx
  *
  *  \note 08/01/2010:
  *  Scaling for foutra power spectrum was tested against theory.
@@ -85,7 +86,7 @@
 #include <tsxx/tapers.h>
 #include <tsxx/filter.h>
 #include <tsxx/wid2timeseries.h>
-#include <tsioxx/inputoperators.h>
+#include <tsioxx/tsioxx.h>
 #include <fstream>
 #include <tfxx/error.h>
 #include <tfxx/rangestring.h>
diff --git a/src/ts/wf/noisymize.cc b/src/ts/wf/noisymize.cc
index 269e477378a0a418ff2185fe66435dfcfdbecf3f..8de28ac02ac6e992b0ddb4d87fd7f2d488389dd9 100644
--- a/src/ts/wf/noisymize.cc
+++ b/src/ts/wf/noisymize.cc
@@ -37,6 +37,7 @@
  *                        - added description in help section
  *                        - improved out format of list of factors
  *  - 07/09/2007   V1.6   corrected horizontal component scaling factor
+ *  - 02/04/2019          use new header file interface to libtsioxx
  * 
  * ============================================================================
  */
@@ -54,7 +55,7 @@
 #include <aff/seriesoperators.h>
 #include <tsxx/tsxx.h>
 #include <tsxx/convolve.h>
-#include <tsioxx/inputoperators.h>
+#include <tsioxx/tsioxx.h>
 #include <tsxx/random.h>
 #include <datrwxx/readany.h>
 #include <datrwxx/sff.h>
diff --git a/src/ts/wf/sigval.cc b/src/ts/wf/sigval.cc
index ac4aaab070034ccee95633470086258df81a9437..85b09576336441b34b65095d8f8f27156838535f 100644
--- a/src/ts/wf/sigval.cc
+++ b/src/ts/wf/sigval.cc
@@ -37,6 +37,7 @@
  *  - 15/04/2014   V1.7   new patterns %HT and %SI
  *  - 01/12/2016   V1.8   fix: do not calculate offset if either SRCE or INFO
  *                        is missing in input file
+ *  - 02/04/2019          use new header file interface to libtsioxx
  * 
  * ============================================================================
  */
@@ -59,7 +60,7 @@
 #include <tsxx/tapers.h>
 #include <tsxx/filter.h>
 #include <tsxx/wid2timeseries.h>
-#include <tsioxx/inputoperators.h>
+#include <tsioxx/tsioxx.h>
 #include <fstream>
 #include <tfxx/error.h>
 #include <tfxx/rangestring.h>
diff --git a/src/ts/wf/soutifu.cc b/src/ts/wf/soutifu.cc
index 2d9f682f4bcaee3b4280ceb320b918db446aead8..f86b485e9081bcf71a171b0472aad1568a5bbf20 100644
--- a/src/ts/wf/soutifu.cc
+++ b/src/ts/wf/soutifu.cc
@@ -33,6 +33,7 @@
  *  - 30/09/2011   V1.2   support additional time series pairs
  *  - 19/10/2015   V1.3   provide full usage information from libstfinv
  *  - 22/11/2016   V1.4   make proper use of output operators
+ *  - 02/04/2019          use new header file interface to libtsioxx
  * 
  * ============================================================================
  */
@@ -44,8 +45,7 @@
 #include <tfxx/error.h>
 #include <tfxx/commandline.h>
 #include <tfxx/seitosh.h>
-#include <tsioxx/inputoperators.h>
-#include <tsioxx/outputoperators.h>
+#include <tsioxx/tsioxx.h>
 #include <datrwxx/readany.h>
 #include <datrwxx/writeany.h>
 #include <stfinv/stfinvany.h>
diff --git a/src/ts/wf/teseco.cc b/src/ts/wf/teseco.cc
index 9f9eed14d53c052d388748376182b86e2730d82a..a4b30e5fe8274f75a2c49e6c613ce2209ae85eb8 100644
--- a/src/ts/wf/teseco.cc
+++ b/src/ts/wf/teseco.cc
@@ -33,6 +33,7 @@
  *  - 28/11/2016   V1.3   allow scaling of signal
  *  - 29/11/2016   V1.4   fix: make use of datetolerance
  *                 V1.5   provide new tolerance option -trim
+ *  - 02/04/2019          use new header file interface to libtsioxx
  *
  * ============================================================================
  */
@@ -48,7 +49,7 @@
 #include <tfxx/misc.h>
 #include <tfxx/rangestring.h>
 #include <tfxx/seitosh.h>
-#include <tsioxx/operators.h>
+#include <tsioxx/tsioxx.h>
 #include <datrwxx/readany.h>
 #include <datrwxx/writeany.h>
 #include <aff/series.h>