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-rw-r--r--mrbgems/mruby-math/src/math.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/mrbgems/mruby-math/src/math.c b/mrbgems/mruby-math/src/math.c
index 3a593b7cf..0b85b1763 100644
--- a/mrbgems/mruby-math/src/math.c
+++ b/mrbgems/mruby-math/src/math.c
@@ -11,6 +11,7 @@
#endif
#include <mruby/array.h>
+#include <mruby/presym.h>
#include <math.h>
static void