diff --git a/src/pifmrds/control_pipe.c b/src/pifmrds/control_pipe.c
index a1b4e19..7665b0a 100644
--- a/src/pifmrds/control_pipe.c
+++ b/src/pifmrds/control_pipe.c
@@ -144,7 +144,7 @@ ResultAndArg poll_control_pipe() {
 			printf("Set RDS to ");
 			if(rds) printf("ON\n"); else printf("OFF\n");
 			resarg.res = CONTROL_PIPE_RDS_SET;
-			resarg.arg = rds;
+			resarg.arg = (char)rds;
 		}
 	}
 	return resarg;
diff --git a/src/pifmrds/pi_fm_rds.cpp b/src/pifmrds/pi_fm_rds.cpp
index bd3b0fc..9c5b13c 100644
--- a/src/pifmrds/pi_fm_rds.cpp
+++ b/src/pifmrds/pi_fm_rds.cpp
@@ -188,7 +188,7 @@ int tx(uint32_t carrier_freq, char *audio_file, uint16_t pi, char *ps, char *rt,
             if(pollResult.res == CONTROL_PIPE_PS_SET) {
                 varying_ps = 0;
             } else if(pollResult.res == CONTROL_PIPE_RDS_SET) {
-                drds = pollResult.arg;
+                drds = (int)pollResult.arg;
             }
         }