1 files changed, 3 insertions, 3 deletions
diff --git a/doio.c b/doio.c
index a956af0dd6..fea7c5d9ee 100644
--- a/doio.c
+++ b/doio.c
@@ -1053,7 +1053,7 @@ Perl_do_eof(pTHX_ GV *gv)
 Off_t
 Perl_do_tell(pTHX_ GV *gv)
 {
-    register IO *io = 0;
+    register IO *io = NULL;
     register PerlIO *fp;
 
     if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
@@ -1072,7 +1072,7 @@ Perl_do_tell(pTHX_ GV *gv)
 bool
 Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
 {
-    register IO *io = 0;
+    register IO *io = NULL;
     register PerlIO *fp;
 
     if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) {
@@ -1091,7 +1091,7 @@ Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence)
 Off_t
 Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence)
 {
-    register IO *io = 0;
+    register IO *io = NULL;
     register PerlIO *fp;
 
     if (gv && (io = GvIO(gv)) && (fp = IoIFP(io)))