diff --git a/ccstruct/rwpoly.cpp b/ccstruct/rwpoly.cpp
index c8d0c3e9033d3b960f034e9edbd55f1c06a21e89..91fb7403fc7c3e366b74db8ff4f66b18202f35da 100644
--- a/ccstruct/rwpoly.cpp
+++ b/ccstruct/rwpoly.cpp
@@ -83,7 +83,7 @@ DLLSYM PAGE_BLOCK_LIST *read_poly_blocks(                  //read file
   page_block_it.set_to_list (pb_list);
   number_of_pblocks = pb_list->length ();
 
-  printf ("%d page blocks read\n", number_of_pblocks);
+  tprintf ("%d page blocks read\n", number_of_pblocks);
   return pb_list;
 
 }
diff --git a/ccutil/scanutils.cpp b/ccutil/scanutils.cpp
index 0bc6dbca8a149fc8fb364075cd328162bf22b361..35906c9f0d57513023980466d98d073f93dea2cf 100644
--- a/ccutil/scanutils.cpp
+++ b/ccutil/scanutils.cpp
@@ -170,7 +170,7 @@ double streamtofloat(FILE* s)
       k *= 10;
     }
   } else if (c == 'e' || c == 'E') 
-    printf("WARNING: Scientific Notation not supported!");
+    tprintf("WARNING: Scientific Notation not supported!");
   
   ungetc(c, s);
   double f  = static_cast<double>(v) 
@@ -204,7 +204,7 @@ double strtofloat(const char* s)
       k *= 10;
     }
   } else if (*s == 'e' || *s == 'E') 
-    printf("WARNING: Scientific Notation not supported!");
+    tprintf("WARNING: Scientific Notation not supported!");
   
   double f  = static_cast<double>(v) 
             + static_cast<double>(w) / static_cast<double>(k);
diff --git a/classify/adaptmatch.cpp b/classify/adaptmatch.cpp
index 7602e2e8fe71dc015e556feb3b48b3418c22ef9b..360ae9377e1a675d9d27e4722030f083fadfba50 100644
--- a/classify/adaptmatch.cpp
+++ b/classify/adaptmatch.cpp
@@ -627,7 +627,7 @@ LIST AdaptiveClassifier(TBLOB *Blob, TBLOB *DotBlob, TEXTROW *Row) {
   NumClassesOutput += count (Choices);
   if (Choices == NIL) {
     if (!bln_numericmode)
-      printf ("Nil classification!\n");  // Should never normally happen.
+      tprintf ("Nil classification!\n");  // Should never normally happen.
     return (append_choice (NIL, "", 50.0f, -20.0f, -1));
   }
 
diff --git a/cutil/cutil.cpp b/cutil/cutil.cpp
index 5ec2cbcaefa141a50b9ff04666f081bab2f7e473..9e00101b31805aa6b31d6ed4e3c14421aece1152 100644
--- a/cutil/cutil.cpp
+++ b/cutil/cutil.cpp
@@ -40,6 +40,7 @@ Import original HP distribution
  **/
 
 #include "cutil.h"
+#include "tprintf.h"
 #include "callcpp.h"
 
 #include <stdlib.h>
@@ -85,7 +86,7 @@ long long_rand(long limit) {
 FILE *open_file(const char *filename, const char *mode) {
   FILE *thisfile = NULL;
   if ((thisfile = fopen (filename, mode)) == NULL) {
-    printf ("Could not open file, %s\n", filename);
+    tprintf ("Could not open file, %s\n", filename);
     exit (1);
   }
   return (thisfile);