diff --git a/src/help.cpp b/src/help.cpp
index 1c880306..3a6abd2a 100644
--- a/src/help.cpp
+++ b/src/help.cpp
@@ -103,6 +103,7 @@ struct PackerNames
     PackerNames() { names_count = 0; o = NULL; }
     void add(Packer *p)
     {
+        p->assertPacker();
         assert(names_count < 32);
         names[names_count].fname = p->getFullName(o);
         names[names_count].sname = p->getName();
diff --git a/src/p_com.h b/src/p_com.h
index 5468d4ff..adc741a1 100644
--- a/src/p_com.h
+++ b/src/p_com.h
@@ -42,7 +42,7 @@ public:
     virtual int getVersion() const { return 13; }
     virtual int getFormat() const { return UPX_F_DOS_COM; }
     virtual const char *getName() const { return "dos/com"; }
-    virtual const char *getFullName(const options_t *o) const { return o->cpu == o->CPU_8086 ? "i086-dos16.com" : "i286-dos16.com"; }
+    virtual const char *getFullName(const options_t *o) const { return o && o->cpu == o->CPU_8086 ? "i086-dos16.com" : "i286-dos16.com"; }
     virtual const int *getCompressionMethods(int method, int level) const;
     virtual const int *getFilters() const;
 
diff --git a/src/p_exe.h b/src/p_exe.h
index 6f0d4f1e..8a0acea0 100644
--- a/src/p_exe.h
+++ b/src/p_exe.h
@@ -42,7 +42,7 @@ public:
     virtual int getVersion() const { return 13; }
     virtual int getFormat() const { return UPX_F_DOS_EXE; }
     virtual const char *getName() const { return "dos/exe"; }
-    virtual const char *getFullName(const options_t *o) const { return o->cpu == o->CPU_8086 ? "i086-dos16.exe" : "i286-dos16.exe"; }
+    virtual const char *getFullName(const options_t *o) const { return o && o->cpu == o->CPU_8086 ? "i086-dos16.exe" : "i286-dos16.exe"; }
     virtual const int *getCompressionMethods(int method, int level) const;
     virtual const int *getFilters() const;
 
diff --git a/src/p_sys.h b/src/p_sys.h
index b3d14f81..9a4d5c71 100644
--- a/src/p_sys.h
+++ b/src/p_sys.h
@@ -42,7 +42,7 @@ public:
     virtual int getVersion() const { return 13; }
     virtual int getFormat() const { return UPX_F_DOS_SYS; }
     virtual const char *getName() const { return "dos/sys"; }
-    virtual const char *getFullName(const options_t *o) const { return o->cpu == o->CPU_8086 ? "i086-dos16.sys" : "i286-dos16.sys"; }
+    virtual const char *getFullName(const options_t *o) const { return o && o->cpu == o->CPU_8086 ? "i086-dos16.sys" : "i286-dos16.sys"; }
 
     virtual bool canPack();
 
diff --git a/src/p_w16ne.h b/src/p_w16ne.h
index 4856beb0..8fa267e4 100644
--- a/src/p_w16ne.h
+++ b/src/p_w16ne.h
@@ -42,7 +42,7 @@ public:
     virtual int getVersion() const { return 13; }
     virtual int getFormat() const { return UPX_F_WIN16_NE; }
     virtual const char *getName() const { return "win16/ne"; }
-    virtual const char *getFullName(const options_t *o) const { return o->cpu == o->CPU_286 ? "i286-win16.ne" : "i386-win16.ne"; }
+    virtual const char *getFullName(const options_t *o) const { return o && o->cpu == o->CPU_286 ? "i286-win16.ne" : "i386-win16.ne"; }
     virtual const int *getCompressionMethods(int method, int level) const;
     virtual const int *getFilters() const;
 
diff --git a/src/packer.cpp b/src/packer.cpp
index 48d8396a..4920ef57 100644
--- a/src/packer.cpp
+++ b/src/packer.cpp
@@ -67,7 +67,8 @@ void Packer::assertPacker()
     assert(getVersion() >= 11);
     assert(getVersion() <= 14);
     assert(strlen(getName()) <= 13);
-    assert(strlen(getFullName(opt)) <= 26); // "i386-linux.kernel.bvmlinuz"
+    assert(strlen(getFullName(opt)) <= 26);     // "i386-linux.kernel.bvmlinuz"
+    assert(strlen(getFullName(NULL)) <= 26);    // "i386-linux.kernel.bvmlinuz"
     if (bele == NULL) fprintf(stderr, "%s\n", getName());
     assert(bele != NULL);
 #if 1
diff --git a/src/ui.cpp b/src/ui.cpp
index fc9005a6..aaabde38 100644
--- a/src/ui.cpp
+++ b/src/ui.cpp
@@ -665,7 +665,7 @@ bool UiPacker::uiFileInfoStart()
     total_files++;
 
     int fg = con_fg(stdout,FG_CYAN);
-    con_fprintf(stdout,"%s [%s]\n", p->fi->getName(), p->getName());
+    con_fprintf(stdout,"%s [%s, %s]\n", p->fi->getName(), p->getFullName(opt), p->getName());
     fg = con_fg(stdout,fg);
     UNUSED(fg);
     if (p->ph.c_len > 0)