diff --git a/rtl/core/neorv32_twi.vhd b/rtl/core/neorv32_twi.vhd
index ee14d721..b0cb3da2 100644
--- a/rtl/core/neorv32_twi.vhd
+++ b/rtl/core/neorv32_twi.vhd
@@ -333,7 +333,7 @@ begin
         -- ------------------------------------------------------------
           if (clk_gen.phase(0) = '1') then
             io_con.sda_out <= '1';
-          elsif (clk_gen.phase(2) = '1') then
+          elsif (clk_gen.phase(1) = '1') then
             io_con.sda_out <= '0';
           end if;
           --