diff --git a/src/modulator.c b/src/modulator.c
index a06ac05..855b66f 100644
--- a/src/modulator.c
+++ b/src/modulator.c
@@ -27,8 +27,8 @@ void init_rds_objects() {
 void set_rds_level(float _level) {
 	level = fminf(1.0f, fmaxf(0.0f, _level));
 }
-void set_rds_gen(uint8_t rdsgen) {
-	rdsgen = rdsgen & 1;
+void set_rds_gen(uint8_t _rdsgen) {
+	rdsgen = _rdsgen & 1;
 }
 
 /* Get an RDS sample. This generates the envelope of the waveform using
diff --git a/src/modulator.h b/src/modulator.h
index 38073cd..7828cc8 100644
--- a/src/modulator.h
+++ b/src/modulator.h
@@ -13,4 +13,4 @@ typedef struct rds_t {
 
 extern void init_rds_objects();
 extern void set_rds_level(float _level);
-extern void set_rds_gen(uint8_t rdsgen);
\ No newline at end of file
+extern void set_rds_gen(uint8_t _rdsgen);
\ No newline at end of file