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-rw-r--r--src/rt/memory_region.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/rt/memory_region.h b/src/rt/memory_region.h
index ee15bf00437..3cec23641b1 100644
--- a/src/rt/memory_region.h
+++ b/src/rt/memory_region.h
@@ -22,7 +22,7 @@
 // hugely expensive and should only be used as a last resort.
 #define RUSTRT_TRACK_ALLOCATIONS 0
 
-class rust_env;
+struct rust_env;
 
 class memory_region {
 private: