--- qtiplot/src/analysis/Convolution.cpp.orig	2009-10-27 12:31:01.000000000 +0100
+++ qtiplot/src/analysis/Convolution.cpp	2009-10-27 12:32:04.000000000 +0100
@@ -33,6 +33,7 @@
 #include <QMessageBox>
 #include <QLocale>
 #include <gsl/gsl_fft_halfcomplex.h>
+#include <gsl/gsl_fft_real.h>
 
 Convolution::Convolution(ApplicationWindow *parent, Table *t, const QString& signalColName, const QString& responseColName)
 : Filter(parent, t)