diff --git a/Modelica/Fluid/Dissipation.mo b/Modelica/Fluid/Dissipation.mo
index f63208dd47..b7f1a7902d 100644
--- a/Modelica/Fluid/Dissipation.mo
+++ b/Modelica/Fluid/Dissipation.mo
@@ -4622,7 +4622,7 @@ Generally this function is numerically best used for the <strong>incompressible
                 0.5)
                 elseif a>0 and b>0 then
                 sign(dp)*(-b/(2*a) + sqrt((b/(2*a))^2 + (1/a)*abs(dp)))
-                else b*dp);
+                else dp/b);
       annotation (Inline=true, smoothOrder(normallyConstant=IN_con) = 2,
                     inverse(dp=Modelica.Fluid.Dissipation.PressureLoss.General.dp_volumeFlowRate_DP(
                 IN_con,