diff --git a/src/libpspp/zip-reader.c b/src/libpspp/zip-reader.c
index 34905b9..72cdd6d 100644
--- a/src/libpspp/zip-reader.c
+++ b/src/libpspp/zip-reader.c
@@ -324,6 +324,8 @@ zip_reader_create (const char *filename, struct string *errs)
       return NULL;
     }
 
+  printf ("%s:%d Found EOCD at 0x%08x\n", __FILE__, __LINE__, offset);
+
   if ( 0 != fseeko (zr->fr, offset, SEEK_SET))
     {
       const char *mm = strerror (errno);
@@ -333,6 +335,7 @@ zip_reader_create (const char *filename, struct string *errs)
       return NULL;
     }
 
+  printf ("%s:%d Checking for EOCD at 0x%08x\n", __FILE__, __LINE__, offset);
 
   if ( ! check_magic (zr->fr, MAGIC_EOCD, zr->errs))
     {
@@ -513,6 +516,8 @@ find_eocd (FILE *fp, off_t *off)
   stop = start + sizeof (magic);
   do 
     {
+      printf ("%s:%d Looking for  EOCD starting at 0x%08x\n", __FILE__, __LINE__, start);
+
       found = probe_magic (fp, magic, start, stop, off);
       /* FIXME: For extra confidence lookup the directory start record here*/
       if ( start == 0)
@@ -539,11 +544,15 @@ probe_magic (FILE *fp, uint32_t magic, off_t start, off_t stop, off_t *off)
   unsigned char seq[4];
   unsigned char byte;
 
+  printf ("%s:%d Seeking to 0x%08x\n", __FILE__, __LINE__, start);
+
   if ( 0 > fseeko (fp, start, SEEK_SET))
     {
       return -1;
     }
 
+  printf ("%s:%d ftello says 0x%08x\n", __FILE__, __LINE__, ftello (fp));
+
   for (i = 0; i < 4 ; ++i)
     {
       seq[i] = (magic >> i * 8) & 0xFF;
@@ -552,6 +561,7 @@ probe_magic (FILE *fp, uint32_t magic, off_t start, off_t stop, off_t *off)
   do
     {
       fread (&byte, 1, 1, fp);
+      printf ("%s:%d read one byte. State: %d ftello 0x%08x\n", __FILE__, __LINE__, state, ftello (fp));
 
       if ( byte == seq[state])
 	state++;
@@ -561,6 +571,7 @@ probe_magic (FILE *fp, uint32_t magic, off_t start, off_t stop, off_t *off)
       if ( state == 4)
 	{
 	  *off = ftello (fp) - 4;
+	  printf ("%s:%d returning offset 0x%08x\n", __FILE__, __LINE__, *off);
 	  return true;
 	}
       start++;