diff --git a/noncblas.cc b/noncblas.cc
index 32e4489..1987989 100644
--- a/noncblas.cc
+++ b/noncblas.cc
@@ -268,7 +268,7 @@ p= (std::complex<double> *) Y; for(int i=0; i<N; ++i) {p->imag(-p->imag()); p+=
 	FORNAME(zgerc)(&N, &M, alpha, Y, &incY, X, &incX, A, &lda);
 #endif
 //conjugate y back
-p= (std::complex<double> *) Y; for(int i=0; i<N; ++i) {p->imag(--p->imag()); p+= incY;}
+p= (std::complex<double> *) Y; for(int i=0; i<N; ++i) {p->imag(-p->imag()); p+= incY;}
 }