diff --git a/desktop-widgets/groupedlineedit.cpp b/desktop-widgets/groupedlineedit.cpp
index 68f53d79e..0358a94b8 100644
--- a/desktop-widgets/groupedlineedit.cpp
+++ b/desktop-widgets/groupedlineedit.cpp
@@ -35,6 +35,7 @@
 #include <QStyle>
 #include <QStyleOptionFocusRect>
 #include <QDebug>
+#include <cmath>
 
 struct GroupedLineEdit::Private {
 	struct Block {
diff --git a/desktop-widgets/kmessagewidget.cpp b/desktop-widgets/kmessagewidget.cpp
index 8a7a154d1..0f261569c 100644
--- a/desktop-widgets/kmessagewidget.cpp
+++ b/desktop-widgets/kmessagewidget.cpp
@@ -30,6 +30,7 @@
 #include <QTimeLine>
 #include <QToolButton>
 #include <QStyle>
+#include <cmath>
 
 //---------------------------------------------------------------------
 // KMessageWidgetPrivate