1 files changed, 8 insertions, 2 deletions
diff --git a/io.c b/io.c
index 7f104f1e8a..c1e68fba4b 100644
--- a/io.c
+++ b/io.c
@@ -2592,9 +2592,11 @@ pipe_open(pstr, pname, mode)
     int modef = rb_io_mode_flags(mode);
     OpenFile *fptr;
 
-    if (!pname) pname = StringValuePtr(pstr);
 #if defined(DJGPP) || defined(__human68k__) || defined(__VMS)
-    FILE *f = popen(pname, mode);
+    FILE *f;
+
+    if (!pname) pname = StringValuePtr(pstr);
+    f = popen(pname, mode);
     
     if (!f) rb_sys_fail(pname);
     else {
@@ -2618,6 +2620,8 @@ pipe_open(pstr, pname, mode)
     int pid;
     FILE *fpr, *fpw;
 
+    if (!pname) pname = StringValuePtr(pstr);
+
 retry:
     pid = pipe_exec(pname, rb_io_mode_modenum(mode), &fpr, &fpw);
     if (pid == -1) {		/* exec failed */
@@ -2650,6 +2654,8 @@ retry:
     int pid, pr[2], pw[2];
     volatile int doexec;
 
+    if (!pname) pname = StringValuePtr(pstr);
+
     if (((modef & FMODE_READABLE) && pipe(pr) == -1) ||
 	((modef & FMODE_WRITABLE) && pipe(pw) == -1))
 	rb_sys_fail(pname);