diff --git a/kernel/sulog.h b/kernel/sulog.h
index 59d2dafa..a87b102d 100644
--- a/kernel/sulog.h
+++ b/kernel/sulog.h
@@ -3,6 +3,7 @@
 
 #include <linux/types.h>
 #include <linux/version.h>
+#include <linux/crc32.h> // needed for function dedup_calc_hash
 
 #define __SULOG_GATE        1
 
@@ -72,4 +73,4 @@ int ksu_sulog_init(void);
 void ksu_sulog_exit(void);
 #endif // __SULOG_GATE
 
-#endif /* __KSU_SULOG_H */
\ No newline at end of file
+#endif /* __KSU_SULOG_H */