diff --git a/include/sys/types_internal.h b/include/sys/types_internal.h
index 1b602f8dd6..91ec5dbbe0 100644
--- a/include/sys/types_internal.h
+++ b/include/sys/types_internal.h
@@ -20,7 +20,7 @@ typedef int suseconds_t;
 typedef long clock_t;
 typedef int clockid_t;
 typedef void* timer_t;
-typedef unsigned long int blkcnt_t;
+typedef long long blkcnt_t;
 
 typedef unsigned long int fsblkcnt_t;
 typedef unsigned long int fsfilcnt_t;
diff --git a/src/platform/types.rs b/src/platform/types.rs
index b7e53dbad1..b980501d93 100644
--- a/src/platform/types.rs
+++ b/src/platform/types.rs
@@ -68,7 +68,7 @@ pub type ino_t = c_ulonglong;
 pub type reclen_t = c_ushort;
 pub type nlink_t = c_ulong;
 pub type blksize_t = c_long;
-pub type blkcnt_t = c_ulong;
+pub type blkcnt_t = c_longlong;
 
 pub type fsblkcnt_t = c_ulong;
 pub type fsfilcnt_t = c_ulong;