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-rw-r--r--src/sim/core.hh2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/sim/core.hh b/src/sim/core.hh
index a529ff17b..4f842ab48 100644
--- a/src/sim/core.hh
+++ b/src/sim/core.hh
@@ -95,7 +95,7 @@ void setClockFrequency(Tick ticksPerSecond);
void setOutputDir(const std::string &dir);
-struct Callback;
+class Callback;
void registerExitCallback(Callback *callback);
void doExitCleanup();