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-rw-r--r--mrbgems/mruby-symbol-ext/src/symbol.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/mrbgems/mruby-symbol-ext/src/symbol.c b/mrbgems/mruby-symbol-ext/src/symbol.c
index b631bffc1..460d2531d 100644
--- a/mrbgems/mruby-symbol-ext/src/symbol.c
+++ b/mrbgems/mruby-symbol-ext/src/symbol.c
@@ -1,6 +1,9 @@
#include <mruby.h>
#include <mruby/array.h>
#include <mruby/string.h>
+#ifdef MRB_USE_ALL_SYMBOLS
+# include <mruby/presym.h>
+#endif
/*
* call-seq: