diff --git a/rtengine/rtthumbnail.cc b/rtengine/rtthumbnail.cc
index 2968c76e7..7f5954295 100644
--- a/rtengine/rtthumbnail.cc
+++ b/rtengine/rtthumbnail.cc
@@ -1363,7 +1363,7 @@ bool Thumbnail::writeData  (const Glib::ustring& fname) {
     FILE *f = safe_g_fopen (fname, "wt");
     if (!f) {
         if (options.rtSettings.verbose)
-            printf("Thumbnail::writeData / Error: unable to open file \"\" with write access!\n", fname.c_str());
+            printf("Thumbnail::writeData / Error: unable to open file \"%s\" with write access!\n", fname.c_str());
         return false;
     }
     else {
diff --git a/rtgui/cacheimagedata.cc b/rtgui/cacheimagedata.cc
index 2c6bfa338..b0f2112e6 100644
--- a/rtgui/cacheimagedata.cc
+++ b/rtgui/cacheimagedata.cc
@@ -170,7 +170,7 @@ int CacheImageData::save (const Glib::ustring& fname) {
     FILE *f = safe_g_fopen (fname, "wt");
     if (!f) {
         if (options.rtSettings.verbose)
-            printf("CacheImageData::save / Error: unable to open file \"\" with write access!\n", fname.c_str());
+            printf("CacheImageData::save / Error: unable to open file \"%s\" with write access!\n", fname.c_str());
         return 1;
     }
     else {
diff --git a/rtgui/options.cc b/rtgui/options.cc
index 521d52c4b..a78ef628d 100644
--- a/rtgui/options.cc
+++ b/rtgui/options.cc
@@ -1029,7 +1029,7 @@ int Options::saveToFile (Glib::ustring fname) {
     FILE *f = safe_g_fopen (fname, "wt");
     if (f==NULL) {
         if (options.rtSettings.verbose)
-            printf("Options::saveToFile / Error: unable to open file \"\" with write access!\n", fname.c_str());
+            printf("Options::saveToFile / Error: unable to open file \"%s\" with write access!\n", fname.c_str());
         return 1;
     }
     else {