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-rw-r--r--src/svgtiny.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/svgtiny.c b/src/svgtiny.c
index aae0b0e..9f71dbe 100644
--- a/src/svgtiny.c
+++ b/src/svgtiny.c
@@ -18,6 +18,9 @@
#include "svgtiny.h"
#include "svgtiny_internal.h"
+#ifndef M_PI
+#define M_PI 3.14159265358979323846
+#endif
static svgtiny_code svgtiny_parse_svg(xmlNode *svg,
struct svgtiny_parse_state state);