1 files changed, 2 insertions, 1 deletions
diff --git a/lib/libpnm1.c b/lib/libpnm1.c
index 29fee13a..045b7afc 100644
--- a/lib/libpnm1.c
+++ b/lib/libpnm1.c
@@ -129,7 +129,8 @@ pnm_readpnminit(FILE *   const fileP,
     break;
 
     default:
-        pm_error("bad magic number - not a ppm, pgm, or pbm file");
+        pm_error("bad magic number 0x%x - not a PPM, PGM, PBM, or PAM file",
+                 realFormat);
     }
     validateComputableSize(*colsP, *rowsP);
 }