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-rw-r--r--src/gui/kernel/qdirectionrecognizer.cpp4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/gui/kernel/qdirectionrecognizer.cpp b/src/gui/kernel/qdirectionrecognizer.cpp
index b88d4f0..a1bc5b1 100644
--- a/src/gui/kernel/qdirectionrecognizer.cpp
+++ b/src/gui/kernel/qdirectionrecognizer.cpp
@@ -43,6 +43,10 @@
#include <math.h>
+#ifndef M_PI
+#define M_PI 3.141592653589793238462643
+#endif
+
QT_BEGIN_NAMESPACE
enum {