diff --git a/codeCore/src/prog8/code/core/BuiltinFunctions.kt b/codeCore/src/prog8/code/core/BuiltinFunctions.kt
index d29b44ea0..9f7655fb0 100644
--- a/codeCore/src/prog8/code/core/BuiltinFunctions.kt
+++ b/codeCore/src/prog8/code/core/BuiltinFunctions.kt
@@ -97,8 +97,8 @@ val BuiltinFunctions: Map<String, FSignature> = mapOf(
     "prog8_lib_square_byte"       to FSignature(true, BaseDataType.UBYTE, FParam("value", BaseDataType.BYTE, BaseDataType.UBYTE)),
     "prog8_lib_square_word"       to FSignature(true, BaseDataType.UWORD, FParam("value", BaseDataType.WORD, BaseDataType.UWORD)),
     "abs"           to FSignature(true, null, FParam("value", *NumericDatatypes)),
-    "abs__byte"     to FSignature(true, BaseDataType.BYTE, FParam("value", BaseDataType.BYTE)),
-    "abs__word"     to FSignature(true, BaseDataType.WORD, FParam("value", BaseDataType.WORD)),
+    "abs__byte"     to FSignature(true, BaseDataType.UBYTE, FParam("value", BaseDataType.BYTE)),
+    "abs__word"     to FSignature(true, BaseDataType.UWORD, FParam("value", BaseDataType.WORD)),
     "abs__float"    to FSignature(true, BaseDataType.FLOAT, FParam("value", BaseDataType.FLOAT)),
     "len"           to FSignature(true, BaseDataType.UWORD, FParam("values", *IterableDatatypes)),
     "sizeof"        to FSignature(true, BaseDataType.UBYTE, FParam("object", *BaseDataType.entries.toTypedArray())),
diff --git a/docs/source/todo.rst b/docs/source/todo.rst
index 345597085..e71a0428d 100644
--- a/docs/source/todo.rst
+++ b/docs/source/todo.rst
@@ -79,7 +79,6 @@ Libraries
 Optimizations
 -------------
 
-- if abs(dx) < cave.VISIBLE_CELLS_H      looks like it treats abs(dx) as signed word still in codegen?  (rockrunner)
 - word offset = (row as uword) * 128 + col*2     inefficient code for col*2  (rockrunner)
 - if magicwall_enabled and (jiffy_counter & 3 == 1)  sounds.magicwall()  -> generates shortcut jump to another jump, why not immediately after the if
 - explode(x, y+1)   pushes x on the stack and pops it, could simply load it in reverse order and not use the stack.normal
diff --git a/examples/test.p8 b/examples/test.p8
index 90fec93e5..3af58b0fc 100644
--- a/examples/test.p8
+++ b/examples/test.p8
@@ -1,45 +1,23 @@
 %import textio
 %option no_sysinit
-%zeropage dontuse
+%zeropage basicsafe
 
 main {
     sub start() {
+        word @shared dx
+        uword @shared udx
+        dx++
+        udx++
+        dx = -5000
+        if abs(dx) < 9999
+            txt.print("yes1")
+        else
+            txt.print("no2")
 
-        cx16.r0 = cx16.r1 = cx16.r2 = cx16.r3 = %0001111_11000011
-
-        cx16.r0 *= $0080
-        txt.print("goede antwoord:\n")
-        txt.print_uwbin(cx16.r0, true)
-        txt.spc()
-        txt.print_uw(cx16.r0)
-        txt.nl()
-
-        %asm {{
-            lda  cx16.r1H
-            lsr  a
-            php     ; save carry
-            lda  cx16.r1L
-            sta  cx16.r1H
-            lda  #0
-            sta  cx16.r1L
-            plp     ; restore carry
-            ror  cx16.r1H
-            ror  cx16.r1L
-        }}
-        txt.print("antwoord 2:\n")
-        txt.print_uwbin(cx16.r1, true)
-        txt.spc()
-        txt.print_uw(cx16.r1)
-        txt.nl()
-        txt.nl()
-        txt.print("antwoord 3:\n")
-        txt.print_uwbin(cx16.r2 << 7, true)
-        txt.spc()
-        txt.print_uw(cx16.r2 << 7)
-        txt.nl()
-        txt.nl()
-
-
-
+        dx = -15000
+        if abs(dx) < 9999
+            txt.print("yes2")
+        else
+            txt.print("no2")
     }
 }