diff --git a/fpga/rtl/acquisition_stream.vhd b/fpga/rtl/acquisition_stream.vhd
index e07f4e1..436989b 100644
--- a/fpga/rtl/acquisition_stream.vhd
+++ b/fpga/rtl/acquisition_stream.vhd
@@ -141,7 +141,7 @@ begin
 
         -- Latch second sample data word.
         if (num_channels > 2) and (sample_valid = '1') then
-            v.sample_pending := '1';
+            v.sample_pending := ch4_mode;
             v.sample_data := sample_data(2 to num_channels - 1);
         end if;
 
diff --git a/fpga/rtl/puzzlefw_pkg.vhd b/fpga/rtl/puzzlefw_pkg.vhd
index b74d242..70534ce 100644
--- a/fpga/rtl/puzzlefw_pkg.vhd
+++ b/fpga/rtl/puzzlefw_pkg.vhd
@@ -96,7 +96,7 @@ package puzzlefw_pkg is
     -- Firmware info word.
     constant fw_api_version:        natural := 1;
     constant fw_version_major:      natural := 0;
-    constant fw_version_minor:      natural := 13;
+    constant fw_version_minor:      natural := 14;
     constant fw_info_word:          std_logic_vector(31 downto 0) :=
         x"4a"
         & std_logic_vector(to_unsigned(fw_api_version, 8))