diff --git a/libraries/base/diag/diag.peripheral.yaml b/libraries/base/diag/diag.peripheral.yaml
index f14f4ef25e3863234a5217b761a91fc35313e9d2..5b08639994c1b375cac2f69b34e3eb31db133df2 100644
--- a/libraries/base/diag/diag.peripheral.yaml
+++ b/libraries/base/diag/diag.peripheral.yaml
@@ -39,7 +39,7 @@ peripherals:
               bit_offset: 0
               address_offset: 0x4
           - - field_name: freq
-              field_description: "Frequency of WG sinus, freq = int('frequency in 0 to 1' * f_clk * 2**width), where f_clk = f_adc in Hz."
+              field_description: "Frequency of WG sinus, freq = int('frequency in range 0 to 1' * f_adc * 2**width), where f_adc is sample frequency in Hz."
               width: 31
               bit_offset: 0
               address_offset: 0x8