diff --git a/src/ScanFormWidget.cpp b/src/ScanFormWidget.cpp
index 43b0b0d..74733f4 100644
--- a/src/ScanFormWidget.cpp
+++ b/src/ScanFormWidget.cpp
@@ -14,6 +14,11 @@
 #include <QImage>
 #include <QPainter>
 
+#ifdef WIN32
+#else
+#include <cmath>
+#endif
+
 ScanFormWidget::ScanFormWidget(QWidget *parent) : TabFormWidget(parent) {
     const char* style="QWidget#PatientInformationForm{min-width:300px;max-width:300px; margin-right:10}"
                       "QWidget#patientinformation_panel{ border-right:1px solid #0078d8}"