diff --git a/src/classic/hsp_ag.c b/src/classic/hsp_ag.c
index cecb5ec49..90b52ae73 100644
--- a/src/classic/hsp_ag.c
+++ b/src/classic/hsp_ag.c
@@ -487,8 +487,8 @@ static void hsp_run(void){
                 }
                 int gain = ag_microphone_gain;
                 ag_microphone_gain = -1;
-                char buffer[10];
-                sprintf(buffer, "%s=%d\r\n", HSP_MICROPHONE_GAIN, gain);
+                char buffer[12];
+                sprintf(buffer, "\r\n%s=%d\r\n", HSP_MICROPHONE_GAIN, gain);
                 hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer);
                 break;
             }
@@ -500,8 +500,8 @@ static void hsp_run(void){
                 }
                 int gain = ag_speaker_gain;
                 ag_speaker_gain = -1;
-                char buffer[10];
-                sprintf(buffer, "%s=%d\r\n", HSP_SPEAKER_GAIN, gain);
+                char buffer[12];
+                sprintf(buffer, "\r\n%s=%d\r\n", HSP_SPEAKER_GAIN, gain);
                 hsp_ag_send_str_over_rfcomm(rfcomm_cid, buffer);
                 break;
             }
diff --git a/src/classic/hsp_hs.c b/src/classic/hsp_hs.c
index 721b2f4e6..28df4d5ce 100644
--- a/src/classic/hsp_hs.c
+++ b/src/classic/hsp_hs.c
@@ -392,7 +392,7 @@ static void hsp_run_handle_state(void){
                     return;
                 }
                 char buffer[20];
-                sprintf(buffer, "%s=%d\r\n", HSP_HS_MICROPHONE_GAIN, hs_microphone_gain);
+                sprintf(buffer, "%s=%d\r", HSP_HS_MICROPHONE_GAIN, hs_microphone_gain);
                 hsp_hs_send_str_over_rfcomm(rfcomm_cid, buffer);
                 hs_microphone_gain = -1;
                 break;
@@ -404,7 +404,7 @@ static void hsp_run_handle_state(void){
                     return;
                 }
                 char buffer[20];
-                sprintf(buffer, "%s=%d\r\n", HSP_HS_SPEAKER_GAIN, hs_speaker_gain);
+                sprintf(buffer, "%s=%d\r", HSP_HS_SPEAKER_GAIN, hs_speaker_gain);
                 hsp_hs_send_str_over_rfcomm(rfcomm_cid, buffer);
                 hs_speaker_gain = -1;
                 break;