diff --git a/veejay-current/veejay-client/src/callback.c b/veejay-current/veejay-client/src/callback.c
index 380dc960..bd910668 100644
--- a/veejay-current/veejay-client/src/callback.c
+++ b/veejay-current/veejay-client/src/callback.c
@@ -2630,8 +2630,11 @@ void	on_curve_buttonstore_clicked(GtkWidget *widget, gpointer user_data )
 	
 	unsigned char *ptr = buf + hdr_len;
 	int k;
+	int diff = max - min;
 	for( k = 0 ; k < length ; k++ ) {
-		int pval = (int) ( (float) min + ( data[k] * ((float) max) ));
+		// pval = ((Input - InputLow) / (InputHigh - InputLow)) * (OutputHigh - OutputLow) + OutputLow;
+		// with InputLow==0 and InputHigh==1 in gtkcurve range
+		int pval = ((data[k]) * ((float)diff)) + min;
 		ptr[0] = pval & 0xff;
 		ptr[1] = (pval >> 8) & 0xff;
 		ptr[2] = (pval >> 16) & 0xff;
diff --git a/veejay-current/veejay-client/src/curve.c b/veejay-current/veejay-client/src/curve.c
index 642715e2..8a08ecf2 100644
--- a/veejay-current/veejay-client/src/curve.c
+++ b/veejay-current/veejay-client/src/curve.c
@@ -62,15 +62,16 @@ int	set_points_in_curve_ext( GtkWidget *curve, unsigned char *blob, int id, int
 	unsigned int k = 0;
 	unsigned char *in = blob + 27;
 	float	*vec = (float*) vj_calloc(sizeof(float) * len );
+	int diff = max - min;
 	for(i = start ; i < end; i ++ )
 	{
 		unsigned char *ptr = in + (k * 4);
 		int value = 
 		  ( ptr[0] | (ptr[1] << 8) | (ptr[2] << 16) | (ptr[3] << 24) );
-	
 
-		float top = 1.0 / (float) max;
-		float val = ( (float)value * top );
+		// val = ((Input - InputLow) / (InputHigh - InputLow)) * (OutputHigh - OutputLow) + OutputLow;
+		// with OutputLow==0 and OutputHigh==1 in gtkcurve range
+		float val = ((float)(value - min) / (diff));
 
 		vec[k] = val;
 		k++;