3 files changed, 5 insertions, 5 deletions
diff --git a/converter/other/fiasco/params.c b/converter/other/fiasco/params.c
index a4d843a8..afacbada 100644
--- a/converter/other/fiasco/params.c
+++ b/converter/other/fiasco/params.c
@@ -656,7 +656,7 @@ usage (const param_t *params, const char *progname, const char *synopsis,
     fprintf (stderr, "Usage: %s [OPTION]...%s\n", progname,
              non_opt_string ? non_opt_string : " ");
     if (synopsis != NULL)
-        fprintf (stderr, synopsis);
+        fprintf (stderr, "%s", synopsis);
     fprintf (stderr, "\n\n");
     fprintf (stderr, "Mandatory or optional arguments to long options "
              "are mandatory or optional\nfor short options too. "
diff --git a/converter/other/fiasco/pnmtofiasco.c b/converter/other/fiasco/pnmtofiasco.c
index d78ff6b1..eebd09a9 100644
--- a/converter/other/fiasco/pnmtofiasco.c
+++ b/converter/other/fiasco/pnmtofiasco.c
@@ -170,7 +170,7 @@ main (int argc, char **argv)
       return 0;
    else
    {
-      fprintf (stderr, fiasco_get_error_message ());
+       fprintf (stderr, "%s", fiasco_get_error_message ());
       fprintf (stderr, "\n");
       return 1;
    }
diff --git a/converter/other/tifftopnm.c b/converter/other/tifftopnm.c
index fcfb03f6..214c02aa 100644
--- a/converter/other/tifftopnm.c
+++ b/converter/other/tifftopnm.c
@@ -1457,7 +1457,7 @@ convertRasterInMemory(pnmOut *       const pnmOutP,
         int ok;
         ok = TIFFRGBAImageOK(tif, emsg);
         if (!ok) {
-            pm_message(emsg);
+            pm_message("%s", emsg);
             *statusP = CONV_UNABLE;
         } else {
             uint32 * raster;
@@ -1477,14 +1477,14 @@ convertRasterInMemory(pnmOut *       const pnmOutP,
                 
                 ok = TIFFRGBAImageBegin(&img, tif, stopOnErrorFalse, emsg);
                 if (!ok) {
-                    pm_message(emsg);
+                    pm_message("%s", emsg);
                     *statusP = CONV_FAILED;
                 } else {
                     int ok;
                     ok = TIFFRGBAImageGet(&img, raster, cols, rows);
                     TIFFRGBAImageEnd(&img) ;
                     if (!ok) {
-                        pm_message(emsg);
+                        pm_message("%s", emsg);
                         *statusP = CONV_FAILED;
                     } else {
                         *statusP = CONV_DONE;