diff --git a/src/p_lx_sh.cpp b/src/p_lx_sh.cpp
index 89e63408..25a521e3 100644
--- a/src/p_lx_sh.cpp
+++ b/src/p_lx_sh.cpp
@@ -104,7 +104,11 @@ bool PackLinuxI386sh::getShellName(char *buf)
         return false;
     for (int j = 0; NULL != shname[j]; ++j) {
         if (0 == strcmp(shname[j], bname + 1)) {
-            return super::canPack();
+            bool const s = super::canPack();
+            if (s) {
+                opt->o_unix.blocksize = blocksize = file_size;
+            }
+            return s;
         }
     }
     return false;
@@ -139,6 +143,13 @@ PackLinuxI386sh::pack1(OutputFile *fo, Filter &)
     generateElfHdr(fo, linux_i386sh_fold, 0x08048000);
 }
 
+void
+PackLinuxI386sh::pack3(OutputFile *fo, Filter &ft)
+{
+    super::pack3(fo,ft);
+    elfout.phdr[0].p_filesz = fo->getBytesWritten();
+}
+
 /*
 vi:ts=4:et
 */
diff --git a/src/p_lx_sh.h b/src/p_lx_sh.h
index 0839c918..fc806117 100644
--- a/src/p_lx_sh.h
+++ b/src/p_lx_sh.h
@@ -48,6 +48,7 @@ public:
     virtual int buildLoader(const Filter *);
 
     virtual void pack1(OutputFile *fo, Filter &ft);
+    virtual void pack3(OutputFile *fo, Filter &ft);
 
     virtual bool canPack();
     // virtual void unpack(OutputFile *fo) { super::unpack(fo); }