diff --git a/src/coreutils/dd/dd.c b/src/coreutils/dd/dd.c
index 6211560..dee0dc7 100644
--- a/src/coreutils/dd/dd.c
+++ b/src/coreutils/dd/dd.c
@@ -6,8 +6,8 @@
 #include <errno.h>
 #include "human.h"
 
-size_t infull, inpart;
-size_t outfull, outpart;
+off_t infull, inpart;
+off_t outfull, outpart;
 off_t tbytes;
 
 void summary(void) {