diff --git a/e2fsprogs/ext2fs/bitops.h b/e2fsprogs/ext2fs/bitops.h
index 5e727d186..922c31c85 100644
--- a/e2fsprogs/ext2fs/bitops.h
+++ b/e2fsprogs/ext2fs/bitops.h
@@ -13,6 +13,7 @@
  * Linus Torvalds.
  */
 
+#include <string.h>
 #include <strings.h>
 
 extern int ext2fs_set_bit(unsigned int nr,void * addr);