diff --git a/core/cds/inc/cds_utils.h b/core/cds/inc/cds_utils.h
index 001aaa20ff42..b81e9b89942e 100644
--- a/core/cds/inc/cds_utils.h
+++ b/core/cds/inc/cds_utils.h
@@ -109,14 +109,6 @@ uint32_t cds_chan_to_freq(uint8_t chan);
 uint8_t cds_freq_to_chan(uint32_t freq);
 enum cds_band_type cds_chan_to_band(uint32_t chan);
 
-/**
- * cds_upper_to_lower: API to convert upper case string into lower case
- * @txt: input text
- * @length: length of input string
- *
- * Return: None
- */
-void cds_upper_to_lower(uint8_t *txt, uint32_t length);
 #ifdef WLAN_FEATURE_11W
 bool cds_is_mmie_valid(uint8_t *key, uint8_t *ipn,
 		       uint8_t *frm, uint8_t *efrm);
diff --git a/core/cds/src/cds_utils.c b/core/cds/src/cds_utils.c
index 428f8bd93093..de0d024f32c7 100644
--- a/core/cds/src/cds_utils.c
+++ b/core/cds/src/cds_utils.c
@@ -659,16 +659,6 @@ uint8_t cds_freq_to_chan(uint32_t freq)
 	return chan;
 }
 
-void cds_upper_to_lower(uint8_t *txt, uint32_t length)
-{
-	int i;
-
-	for (i = 0; i < length; i++) {
-		if (txt[i] >= 'A' && txt[i] <= 'Z')
-			txt[i] = txt[i] + 32;
-	}
-}
-
 enum cds_band_type cds_chan_to_band(uint32_t chan)
 {
 	if (chan <= CDS_24_GHZ_CHANNEL_14)