diff --git a/FDTD/operator.cpp b/FDTD/operator.cpp
index 3c45a16..544514d 100644
--- a/FDTD/operator.cpp
+++ b/FDTD/operator.cpp
@@ -518,7 +518,7 @@ void Operator::InitOperator()
 	ii = Create_N_3DArray(numLines);
 }
 
-inline void Operator::Calc_ECOperatorPos(int n, unsigned int* pos)
+void Operator::Calc_ECOperatorPos(int n, unsigned int* pos)
 {
 	unsigned int i = MainOp->SetPos(pos[0],pos[1],pos[2]);
 	vv[n][pos[0]][pos[1]][pos[2]] = (1-dT*EC_G[n][i]/2/EC_C[n][i])/(1+dT*EC_G[n][i]/2/EC_C[n][i]);
diff --git a/FDTD/operator.h b/FDTD/operator.h
index 5a7aa8d..d5504b7 100644
--- a/FDTD/operator.h
+++ b/FDTD/operator.h
@@ -109,7 +109,7 @@ protected:
 	unsigned int m_nyquistTS;
 
 	//! Calc operator at certain pos
-	virtual inline void Calc_ECOperatorPos(int n, unsigned int* pos);
+	virtual void Calc_ECOperatorPos(int n, unsigned int* pos);
 
 	//EC elements, internal only!
 	virtual bool Calc_EC();