1 files changed, 5 insertions, 5 deletions
diff --git a/src/interpolator.c b/src/interpolator.c
index 84ddd5d..e47fbe3 100644
--- a/src/interpolator.c
+++ b/src/interpolator.c
@@ -43,10 +43,10 @@ interpolate(float interval,
 }
 
 typedef struct {
-	float* input;
-	float* output;
-	float  p1;
-	float  p0;
+	const float* input;
+	float*       output;
+	float        p1;
+	float        p0;
 } Interpolator;
 
 static void
@@ -64,7 +64,7 @@ connect_port(LV2_Handle instance,
 
 	switch (port) {
 	case INTERPOLATOR_INPUT:
-		plugin->input = (float*)data;
+		plugin->input = (const float*)data;
 		break;
 	case INTERPOLATOR_OUTPUT:
 		plugin->output = (float*)data;