diff --git a/src/debug.cc b/src/debug.cc
index ee3c193..041b414 100644
--- a/src/debug.cc
+++ b/src/debug.cc
@@ -15,6 +15,7 @@
 // You should have received a copy of the GNU General Public License
 // along with brlaser.  If not, see <http://www.gnu.org/licenses/>.
 
+#include "config.h"
 #include "debug.h"
 #include <iostream>
 #include <typeinfo>
@@ -23,12 +24,12 @@ namespace {
 
 template <typename T>
 void dump(const char *name, const T &value) {
-  std::cerr << "DEBUG: page header: " << name << " = " << value << '\n';
+  std::cerr << "DEBUG: " PACKAGE ": page header: " << name << " = " << value << '\n';
 }
 
 template <typename T, int N>
 void dump(const char *name, const T (&value)[N]) {
-  std::cerr << "DEBUG: page header: " << name << " =";
+  std::cerr << "DEBUG: " PACKAGE ": page header: " << name << " =";
   for (int i = 0; i < N; ++i) {
     std::cerr << ' ' << value[i];
   }
@@ -36,12 +37,12 @@ void dump(const char *name, const T (&value)[N]) {
 }
 
 void dump(const char *name, const char *value) {
-  std::cerr << "DEBUG: page header: " << name << " = \"" << value << "\"\n";
+  std::cerr << "DEBUG: " PACKAGE ": page header: " << name << " = \"" << value << "\"\n";
 }
 
 template <int N, int M>
 void dump(const char *name, const char (&value)[N][M]) {
-  std::cerr << "DEBUG: page header: " << name << " =";
+  std::cerr << "DEBUG: " PACKAGE ": page header: " << name << " =";
   for (int i = 0; i < N; ++i) {
     std::cerr << " \"" << value[i] << '"';
   }
diff --git a/src/main.cc b/src/main.cc
index a185dec..7705168 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -151,14 +151,14 @@ int main(int argc, char *argv[]) {
   if (job_filename) {
     fd = open(job_filename, O_RDONLY);
     if (fd < 0) {
-      fprintf(stderr, "ERROR: Unable to open raster file\n");
+      fprintf(stderr, "ERROR: " PACKAGE ": Unable to open raster file\n");
       return 1;
     }
   }
 
   ras = cupsRasterOpen(fd, CUPS_RASTER_READ);
   if (!ras) {
-    fprintf(stderr, "ERROR: Can't read raster data\n");
+    fprintf(stderr, "ERROR: " PACKAGE ": Can't read raster data\n");
     return 1;
   }
 
@@ -170,12 +170,12 @@ int main(int argc, char *argv[]) {
           || header.cupsBitsPerColor != 1
           || header.cupsNumColors != 1
           || header.cupsBytesPerLine > 10000) {
-        fprintf(stderr, "ERROR: Page %d: Bogus raster data.\n", pages + 1);
+        fprintf(stderr, "ERROR: " PACKAGE ": Page %d: Bogus raster data.\n", pages + 1);
         dump_page_header(header);
         return 1;
       }
       if (pages == 0) {
-        fprintf(stderr, "DEBUG: Page header of first page\n");
+        fprintf(stderr, "DEBUG: " PACKAGE ": Page header of first page\n");
         dump_page_header(header);
       }
       job.encode_page(build_page_params(),
@@ -187,13 +187,13 @@ int main(int argc, char *argv[]) {
   }
 
   if (pages == 0) {
-    fprintf(stderr, "ERROR: No pages were found.\n");
+    fprintf(stderr, "ERROR: " PACKAGE ": No pages were found.\n");
     return 1;
   }
 
   fflush(stdout);
   if (ferror(stdout)) {
-    fprintf(stderr, "ERROR: Could not write print data\n");
+    fprintf(stderr, "ERROR: " PACKAGE ": Could not write print data\n");
     return 1;
   }
   return 0;