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-rw-r--r--src/glu/sgi/libtess/tess.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/glu/sgi/libtess/tess.c b/src/glu/sgi/libtess/tess.c
index 029a02c3ae4..4a0e8dea7f7 100644
--- a/src/glu/sgi/libtess/tess.c
+++ b/src/glu/sgi/libtess/tess.c
@@ -47,8 +47,12 @@
#define GLU_TESS_DEFAULT_TOLERANCE 0.0
#define GLU_TESS_MESH 100112 /* void (*)(GLUmesh *mesh) */
+#ifndef TRUE
#define TRUE 1
+#endif
+#ifndef FALSE
#define FALSE 0
+#endif
/*ARGSUSED*/ static void GLAPIENTRY noBegin( GLenum type ) {}
/*ARGSUSED*/ static void GLAPIENTRY noEdgeFlag( GLboolean boundaryEdge ) {}