1 files changed, 0 insertions, 1 deletions
diff --git a/debug.c b/debug.c
index e0ff94886b..75d4cc6569 100644
--- a/debug.c
+++ b/debug.c
@@ -263,7 +263,6 @@ ruby_set_debug_option(const char *str)
 }
 
 #if RUBY_DEVEL
-#undef getenv
 
 // RUBY_DEBUG_LOG features
 // See vm_debug.h comments for details.