diff --git a/filter/ysvf.h b/filter/ysvf.h
index a4a18bd..57df068 100644
--- a/filter/ysvf.h
+++ b/filter/ysvf.h
@@ -96,10 +96,10 @@ public:
 
 private:
     filter_types filter_type;
-    ylowpass lowpass;
-    yhighpass highpass;
-    ybandpass bandpass;
-    ynotch notch;
+    ylowpass<t_sample> lowpass;
+    yhighpass<t_sample> highpass;
+    ybandpass<t_sample> bandpass;
+    ynotch<t_sample> notch;
 
     double clamp(double& value, double min, double max) {
         if (value < min) {