2 files changed, 3 insertions, 7 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 6c28e61a718..0716233d612 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -5,6 +5,7 @@
         (create_pty): Remove unnecessary "volatile"s.
         (Fnetwork_interface_info): Avoid possibility of int overflow.
         (read_process_output): Do adaptive read buffering even if carryover.
+        (read_process_output): Simplify nbytes computation if buffered.
 
         * bytecode.c (exec_byte_code): Rename local to avoid shadowing.
 
diff --git a/src/process.c b/src/process.c
index 33f41c4a8f0..a9a8eb79ede 100644
--- a/src/process.c
+++ b/src/process.c
@@ -5205,13 +5205,8 @@ read_process_output (Lisp_Object proc, register int channel)
             }
         }
 #endif
-      if (buffered)
-        {
-          if (nbytes < 0)
-            nbytes = 1;
-          else
-            nbytes = nbytes + 1;
-        }
+      nbytes += buffered;
+      nbytes += buffered && nbytes <= 0;
     }
 
   p->decoding_carryover = 0;