1 files changed, 4 insertions, 0 deletions

diff --git a/src/mmap.c b/src/mmap.c
index 48e84ae..148b852 100644
--- a/src/mmap.c
+++ b/src/mmap.c
@@ -367,6 +367,10 @@ _gdbm_mapped_lseek (GDBM_FILE dbf, off_t offset, int whence)
             needle = file_size - offset; 
             break;
           }
+
+        default:
+          errno = EINVAL;
+          return -1;
         }
 
       if (needle < 0)