diff --git a/docs/source/todo.rst b/docs/source/todo.rst
index 9f1800b25..ebde311bc 100644
--- a/docs/source/todo.rst
+++ b/docs/source/todo.rst
@@ -2,6 +2,7 @@
 TODO
 ====
 
+- allocate sub params in zeropage as well (it already allows @zp tag on them!)
 - optimize assignment codegeneration
 - get rid of all TODO's ;-)
 - make it possible to use cpu opcodes such as 'nop' as variable names by prefixing all asm vars with something such as '_'
diff --git a/examples/plasma.p8 b/examples/plasma.p8
index 68e3b02df..9465cbcaf 100644
--- a/examples/plasma.p8
+++ b/examples/plasma.p8
@@ -74,9 +74,7 @@ main {
         uword @zp scrptr = screen
         for y in 24 downto 0 {
             for x in 39 downto 0 {
-                @(scrptr) = xbuf[x]
-                @(scrptr) += ybuf[y]
-                ;@(scrptr) = xbuf[x] + ybuf[y]
+                @(scrptr) = xbuf[x] + ybuf[y]
 ;                %asm {{
 ;                     ldy  x
 ;                     lda  xbuf,y
diff --git a/examples/test.p8 b/examples/test.p8
index 78b291f53..e15d02d8d 100644
--- a/examples/test.p8
+++ b/examples/test.p8
@@ -4,10 +4,9 @@
 main {
 
     sub start() {
-        ubyte bb = 1
         uword addr=$d020
-        @(addr) = bb
-        bb = @(addr)
+        ubyte q =2
+        @(addr) += q
     }
 }