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-rw-r--r--src/expand/proc_macro.cpp4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/expand/proc_macro.cpp b/src/expand/proc_macro.cpp
index 3eb0c85d..5c06a8ce 100644
--- a/src/expand/proc_macro.cpp
+++ b/src/expand/proc_macro.cpp
@@ -24,6 +24,10 @@
# include <sys/wait.h>
#endif
+#ifdef __OpenBSD__
+extern char **environ;
+#endif
+
#define NEWNODE(_ty, ...) ::AST::ExprNodeP(new ::AST::ExprNode##_ty(__VA_ARGS__))
class Decorator_ProcMacroDerive: