diff --git a/basis/unix/statfs/freebsd/freebsd.factor b/basis/unix/statfs/freebsd/freebsd.factor
index c9271ff007..ae418e6eb4 100644
--- a/basis/unix/statfs/freebsd/freebsd.factor
+++ b/basis/unix/statfs/freebsd/freebsd.factor
@@ -31,4 +31,4 @@ STRUCT: statfs
     { f_mntfromname { char MNAMELEN } }
     { f_mntonname { char MNAMELEN } } ;
 
-FUNCTION: int statfs ( char* path, statvfs* buf ) ;
+FUNCTION: int statfs ( char* path, statfs* buf ) ;
diff --git a/vm/os-windows.hpp b/vm/os-windows.hpp
index 319ad6c42a..b12ebd0610 100644
--- a/vm/os-windows.hpp
+++ b/vm/os-windows.hpp
@@ -19,8 +19,8 @@ typedef wchar_t vm_char;
 #define STRNCMP wcsncmp
 #define STRDUP _wcsdup
 #define MIN(a,b) ((a)>(b)?(b):(a))
-#define FTELL _ftelli64
-#define FSEEK _fseeki64
+#define FTELL ftello64
+#define FSEEK fseeko64
 
 #ifdef WIN64
 	#define CELL_FORMAT "%Iu"