diff --git a/libsrc/apple2/mli.inc b/libsrc/apple2/mli.inc
index e28981b4a..9b470073e 100644
--- a/libsrc/apple2/mli.inc
+++ b/libsrc/apple2/mli.inc
@@ -53,6 +53,13 @@ EOF_COUNT       = 2
 
         .struct MLI
                 .union
+                        ; Pseudo-struct to make clear that calls with a
+                        ; PATHNAME parameter always have PATHNAME in the
+                        ; same place
+                        .struct PATH
+                                PARAM_COUNT     .byte
+                                PATHNAME        .addr
+                        .endstruct
                         .struct RW_BLOCK
                                 PARAM_COUNT     .byte
                                 UNIT_NUM        .byte
@@ -130,6 +137,13 @@ EOF_COUNT       = 2
                 .endunion
         .endstruct
 
+        ; Assert that PATHNAME parameters is always at the same place
+        .assert MLI::CREATE::PATHNAME  = MLI::PATH::PATHNAME, error
+        .assert MLI::DESTROY::PATHNAME = MLI::PATH::PATHNAME, error
+        .assert MLI::INFO::PATHNAME    = MLI::PATH::PATHNAME, error
+        .assert MLI::PREFIX::PATHNAME  = MLI::PATH::PATHNAME, error
+        .assert MLI::OPEN::PATHNAME    = MLI::PATH::PATHNAME, error
+
         .global         mliparam
         .global         callmli
 
diff --git a/libsrc/apple2/mli_set_pathname.s b/libsrc/apple2/mli_set_pathname.s
new file mode 100644
index 000000000..90109353e
--- /dev/null
+++ b/libsrc/apple2/mli_set_pathname.s
@@ -0,0 +1,16 @@
+;
+; Colin Leroy-Mira, 2025 <colin@colino.net>
+;
+
+        .export         mli_set_pathname_tos
+        .include        "zeropage.inc"
+        .include        "mli.inc"
+
+        ; Sets MLI PATHNAME parameter from TOS
+mli_set_pathname_tos:
+        ; Set pushed name from TOS
+        lda     c_sp
+        ldx     c_sp+1
+        sta     mliparam + MLI::PATH::PATHNAME
+        stx     mliparam + MLI::PATH::PATHNAME+1
+        rts
diff --git a/libsrc/apple2/open.s b/libsrc/apple2/open.s
index ec788153e..947e6580f 100644
--- a/libsrc/apple2/open.s
+++ b/libsrc/apple2/open.s
@@ -9,7 +9,7 @@
         .constructor    raisefilelevel
         .destructor     closeallfiles, 5
 
-        .import         pushname_tos, popname, __dos_type
+        .import         pushname_tos, popname, mli_set_pathname_tos, __dos_type
         .import         iobuf_alloc, iobuf_free
         .import         addysp, incsp4, incaxy, pushax, popax
 
@@ -91,10 +91,7 @@ found:  sty     tmp2
         bne     oserr1
 
         ; Set pushed name
-        lda     c_sp
-        ldx     c_sp+1
-        sta     mliparam + MLI::OPEN::PATHNAME
-        stx     mliparam + MLI::OPEN::PATHNAME+1
+        jsr     mli_set_pathname_tos
 
         ; Check for create flag
         lda     tmp3            ; Restore flags
diff --git a/libsrc/apple2/syschdir.s b/libsrc/apple2/syschdir.s
index be78a91b9..c1c857a6a 100644
--- a/libsrc/apple2/syschdir.s
+++ b/libsrc/apple2/syschdir.s
@@ -5,7 +5,7 @@
 ;
 
         .export         __syschdir
-        .import         pushname, popname
+        .import         pushname, popname, mli_set_pathname_tos
         .import         initcwd
 
         .include        "zeropage.inc"
@@ -17,10 +17,7 @@ __syschdir:
         bne     oserr
 
         ; Set pushed name
-        lda     c_sp
-        ldx     c_sp+1
-        sta     mliparam + MLI::PREFIX::PATHNAME
-        stx     mliparam + MLI::PREFIX::PATHNAME+1
+        jsr     mli_set_pathname_tos
 
         ; Change directory
         lda     #SET_PREFIX_CALL
diff --git a/libsrc/apple2/sysmkdir.s b/libsrc/apple2/sysmkdir.s
index 1f62d323f..f654fcbca 100644
--- a/libsrc/apple2/sysmkdir.s
+++ b/libsrc/apple2/sysmkdir.s
@@ -5,7 +5,7 @@
 ;
 
         .export         __sysmkdir
-        .import         pushname_tos, popname
+        .import         pushname_tos, popname, mli_set_pathname_tos
         .import         addysp, popax
 
         .include        "zeropage.inc"
@@ -22,10 +22,7 @@ __sysmkdir:
         bne     oserr
 
         ; Set pushed name
-        lda     c_sp
-        ldx     c_sp+1
-        sta     mliparam + MLI::CREATE::PATHNAME
-        stx     mliparam + MLI::CREATE::PATHNAME+1
+        jsr     mli_set_pathname_tos
 
         ; Set all other parameters from template
         ldx     #(MLI::CREATE::CREATE_TIME+1) - (MLI::CREATE::PATHNAME+1) - 1
diff --git a/libsrc/apple2/sysremove.s b/libsrc/apple2/sysremove.s
index 088407024..c5eadc85a 100644
--- a/libsrc/apple2/sysremove.s
+++ b/libsrc/apple2/sysremove.s
@@ -5,7 +5,7 @@
 ;
 
         .export         __sysremove
-        .import         pushname, popname
+        .import         pushname, popname, mli_set_pathname_tos
 
         .include        "zeropage.inc"
         .include        "mli.inc"
@@ -16,10 +16,7 @@ __sysremove:
         bne     oserr
 
         ; Set pushed name
-        lda     c_sp
-        ldx     c_sp+1
-        sta     mliparam + MLI::DESTROY::PATHNAME
-        stx     mliparam + MLI::DESTROY::PATHNAME+1
+        jsr     mli_set_pathname_tos
 
         ; Remove file
         lda     #DESTROY_CALL
diff --git a/libsrc/apple2/sysrename.s b/libsrc/apple2/sysrename.s
index 927132254..2001f3f5e 100644
--- a/libsrc/apple2/sysrename.s
+++ b/libsrc/apple2/sysrename.s
@@ -5,7 +5,7 @@
 ;
 
         .export         __sysrename
-        .import         pushname, pushname_tos, popname
+        .import         pushname, pushname_tos, mli_set_pathname_tos, popname
         .import         popax
 
         .include        "zeropage.inc"
@@ -21,10 +21,7 @@ __sysrename:
         bne     oserr1
 
         ; Set pushed oldname
-        lda     c_sp
-        ldx     c_sp+1
-        sta     mliparam + MLI::RENAME::PATHNAME
-        stx     mliparam + MLI::RENAME::PATHNAME+1
+        jsr     mli_set_pathname_tos
 
         ; Restore and push newname
         lda     ptr2