diff --git a/src/fpu/fdivsqrt/fdivsqrtfsm.sv b/src/fpu/fdivsqrt/fdivsqrtfsm.sv
index 81f6a5ee..da13813f 100644
--- a/src/fpu/fdivsqrt/fdivsqrtfsm.sv
+++ b/src/fpu/fdivsqrt/fdivsqrtfsm.sv
@@ -60,9 +60,9 @@ module fdivsqrtfsm(
   assign IFDivStartE = (FDivStartE | (IDivStartE & `IDIV_ON_FPU)) & (state == IDLE) & ~StallM;
   assign FDivDoneE = (state == DONE);
   assign FDivBusyE = (state == BUSY) | IFDivStartE; 
-
+ 
   // terminate immediately on special cases
-  assign FSpecialCaseE = XZeroE | (YZeroE&~SqrtE) | XInfE | YInfE | XNaNE | YNaNE | (XsE&SqrtE);
+  assign FSpecialCaseE = XZeroE | | XInfE  | XNaNE |  (XsE&SqrtE) | (YZeroE | YInfE | YNaNE)&~SqrtE;
   if (`IDIV_ON_FPU) assign SpecialCaseE = IntDivE ? ISpecialCaseE : FSpecialCaseE;
   else              assign SpecialCaseE = FSpecialCaseE;
   flopenr #(1) SpecialCaseReg(clk, reset, IFDivStartE, SpecialCaseE, SpecialCaseM); // save SpecialCase for checking in fdivsqrtpostproc