diff --git a/src/runner_iact_legacy.h b/src/runner_iact_legacy.h
index 3f5df4cd40668862a2e2c0a01c5b28069f184377..42044caafc8686f4ce5f639bacc16f297f266868 100644
--- a/src/runner_iact_legacy.h
+++ b/src/runner_iact_legacy.h
@@ -18,7 +18,7 @@
  *
  ******************************************************************************/
 #ifndef SWIFT_RUNNER_IACT_LEGACY_H
-#define SWIFT_RUNNER_IACT_LECAGY_H
+#define SWIFT_RUNNER_IACT_LEGACY_H
 
 /* Includes. */
 #include "const.h"