1 files changed, 2 insertions, 2 deletions

diff --git a/src/process.c b/src/process.c
index 8fbd8ac92e2..f25d10dbd67 100644
--- a/src/process.c
+++ b/src/process.c
@@ -3723,9 +3723,9 @@ FLAGS is the current flags of the interface.  */)
               flags -= fp->flag_bit;
             }
         }
-      for (fnum = 0; flags && fnum < 32; fnum++)
+      for (fnum = 0; flags && fnum < 32; flags >>= 1, fnum++)
         {
-          if (flags & (1 << fnum))
+          if (flags & 1)
             {
               elt = Fcons (make_number (fnum), elt);
             }