diff --git a/src/MVFlowBlur.cpp b/src/MVFlowBlur.cpp
index 5df445e..c6bea73 100644
--- a/src/MVFlowBlur.cpp
+++ b/src/MVFlowBlur.cpp
@@ -39,7 +39,7 @@ typedef struct {
     VSNodeRef *mvbw;
     VSNodeRef *mvfw;
 
-    int blur;
+    float blur;
     int prec;
     int thscd1;
     int thscd2;