diff --git a/bin/ace b/bin/ace
index da2c6ea..ba95b88 100644
Binary files a/bin/ace and b/bin/ace differ
diff --git a/src/ace/c/acedef.h b/src/ace/c/acedef.h
index b053a5b..a7944c2 100755
--- a/src/ace/c/acedef.h
+++ b/src/ace/c/acedef.h
@@ -483,6 +483,7 @@ typedef struct symstruct {
 			  SHORT	 no_of_params;       /* # of SUB parameters */
 			  int	 p_type[MAXPARAMS];  /* SUB parameter types */
 			  int	 p_addr[MAXPARAMS];  /* SUB parameter frame offsets */
+			  struct symstruct *p_structdef[MAXPARAMS]; /* structdef for struct-typed params */
 			  UBYTE  decl;		     /* forward reference? */
 			  UBYTE  *reg;	     	     /* lib function regs */
 			  char   *libname;	     /* library name */
diff --git a/src/ace/c/sub.c b/src/ace/c/sub.c
index 4a69a27..d5ab885 100755
--- a/src/ace/c/sub.c
+++ b/src/ace/c/sub.c
@@ -125,6 +125,13 @@ int   sub_type=undefined;
      param_type = sym_to_type(sym);
      insymbol();
     }
+    else if (sym == ident && exist(id, structdef))
+    {
+     /* struct type identifier -> treat as ADDRESS */
+     sub_ptr->p_structdef[param_count] = curr_item;
+     param_type = longtype;
+     insymbol();
+    }
 
     if (sym != ident) _error(7);  /* ident expected */
     else
@@ -285,6 +292,7 @@ SYM  *sub_ptr;
 SHORT param_count=0;
 int   param_type;
 char  addrbuf[40];
+SYM   *struct_param_def;
 
  /* parse current SUB's formal parameter list */
 
@@ -306,6 +314,7 @@ char  addrbuf[40];
   do
   {
    param_type=undefined;
+   struct_param_def=NULL;
 
    insymbol();
 
@@ -316,20 +325,38 @@ char  addrbuf[40];
     param_type = sym_to_type(sym);
     insymbol();
    }
+   else if (sym == ident && exist(id, structdef))
+   {
+    /* struct type identifier -> treat as ADDRESS */
+    struct_param_def = curr_item;
+    param_type = longtype;
+    insymbol();
+   }
 
    if (sym != ident) _error(7);  /* ident expected */
    else
    {
-    if (!exist(id,variable)) /* treat param's as local variables */
+    if (struct_param_def != NULL)
+    {
+       /* struct-typed parameter: enter as structure object */
+       if (exist(id, structure))
+          _error(38); /* duplicate parameter */
+       else
+       {
+          enter(id, notype, structure, 0);
+          curr_item->other = struct_param_def;
+       }
+    }
+    else if (!exist(id,variable)) /* treat param's as local variables */
     {
-       /* if type not already specified, take type indicated by ident */ 
+       /* if type not already specified, take type indicated by ident */
        if (param_type == undefined) param_type = typ;
 
        /* enter parameter as a variable into symbol table */
        enter(id,param_type,variable,0);
 
        /* string parameter? -> associate with BSS object */
-       if (curr_item->type == stringtype)  
+       if (curr_item->type == stringtype)
        {
           gen_frame_addr(curr_item->address,addrbuf);
 	  gen("move.l",addrbuf,"-(sp)");  /* push value parameter */
@@ -343,6 +370,7 @@ char  addrbuf[40];
    /* store parameter type and address */
    sub_ptr->p_type[param_count]=param_type;
    sub_ptr->p_addr[param_count]=curr_item->address;
+   sub_ptr->p_structdef[param_count]=struct_param_def;
    param_count++;
 
    insymbol();
diff --git a/verify/scripts/otherthenamiga/call-on-ustartup b/verify/scripts/otherthenamiga/call-on-ustartup
index 1b70ba1..8b13789 100644
--- a/verify/scripts/otherthenamiga/call-on-ustartup
+++ b/verify/scripts/otherthenamiga/call-on-ustartup
@@ -1 +1 @@
-; nothing to do
+
diff --git a/verify/tests/cases/syntax/test_struct_sub_param.b b/verify/tests/cases/syntax/test_struct_sub_param.b
new file mode 100644
index 0000000..bf3da4f
--- /dev/null
+++ b/verify/tests/cases/syntax/test_struct_sub_param.b
@@ -0,0 +1,13 @@
+STRUCT Vec2D
+  SINGLE x
+  SINGLE y
+END STRUCT
+
+SUB PrintVec(Vec2D p)
+  PRINT p->x; ","; p->y
+END SUB
+
+DECLARE STRUCT Vec2D pt
+pt->x = 3.0
+pt->y = 4.0
+PrintVec(pt)
diff --git a/verify/tests/expected/test_struct_sub_param.expected b/verify/tests/expected/test_struct_sub_param.expected
new file mode 100644
index 0000000..29a9188
--- /dev/null
+++ b/verify/tests/expected/test_struct_sub_param.expected
@@ -0,0 +1 @@
+ 3 , 4