diff --git a/source/subs_functions/subs_functions.bas b/source/subs_functions/subs_functions.bas
index 2cc8cd2aa..9df877f12 100644
--- a/source/subs_functions/subs_functions.bas
+++ b/source/subs_functions/subs_functions.bas
@@ -87,12 +87,20 @@ SUB reginternal
     clearid
     id.n = "_Continue": id.subfunc = 2: id.callname = "sub_stub": regid
 
+    clearid
+    id.n = "_CLngPtr"
+    id.subfunc = 1
+    id.args = 1
+    id.arg = MKL$(UOFFSETTYPE - ISPOINTER)
+    id.ret = UINTEGER64TYPE - ISPOINTER
+    id.hr_syntax = "_CLngPtr(offsetValue)"
+    regid
+
     clearid
     id.n = "_IIf"
     id.subfunc = 1
     id.args = 3
     id.arg = MKL$(OFFSETTYPE - ISPOINTER) + MKL$(STRINGTYPE - ISPOINTER) + MKL$(STRINGTYPE - ISPOINTER) ' overridden in qb64pe.bas
-    id.specialformat = "?,?,?"
     id.ret = STRINGTYPE - ISPOINTER ' overridden in qb64pe.bas
     id.hr_syntax = "_IIF(expression, truePart, falsePart)"
     regid
diff --git a/source/subs_functions/syntax_highlighter_list.bas b/source/subs_functions/syntax_highlighter_list.bas
index 180fc1650..fe2b27e8e 100644
--- a/source/subs_functions/syntax_highlighter_list.bas
+++ b/source/subs_functions/syntax_highlighter_list.bas
@@ -20,7 +20,7 @@ listOfKeywords$ = listOfKeywords$ +_
 
 ' [C] - Keywords alphabetical (1st line = QB64, 2nd line = QB4.5, 3rd line = OpenGL)
 listOfKeywords$ = listOfKeywords$ +_
-"_CAPSLOCK@_CEIL@_CINP@_CLEAR@_CLEARCOLOR@_CLIP@_CLIPBOARD$@_CLIPBOARDIMAGE@_CLOCKWISE@_COLORCHOOSERDIALOG@_COMMANDCOUNT@_CONNECTED@_CONNECTIONADDRESS@_CONNECTIONADDRESS$@_CONSOLE@_CONSOLECURSOR@_CONSOLEFONT@_CONSOLEINPUT@_CONSOLETITLE@_CONTINUE@_CONTROLCHR@_COPYIMAGE@_COPYPALETTE@_COSH@_COT@_COTH@_CRC32@_CSC@_CSCH@_CV@_CWD$@" +_
+"_CAPSLOCK@_CEIL@_CINP@_CLEAR@_CLEARCOLOR@_CLIP@_CLIPBOARD$@_CLIPBOARDIMAGE@_CLNGPTR@_CLOCKWISE@_COLORCHOOSERDIALOG@_COMMANDCOUNT@_CONNECTED@_CONNECTIONADDRESS@_CONNECTIONADDRESS$@_CONSOLE@_CONSOLECURSOR@_CONSOLEFONT@_CONSOLEINPUT@_CONSOLETITLE@_CONTINUE@_CONTROLCHR@_COPYIMAGE@_COPYPALETTE@_COSH@_COT@_COTH@_CRC32@_CSC@_CSCH@_CV@_CWD$@" +_
 "CALL@CALLS@CASE@CDBL@CDECL@CHAIN@CHDIR@CHR$@CINT@CIRCLE@CLEAR@CLNG@CLOSE@CLS@COLOR@COM@COMMAND$@COMMON@CONSOLE@CONST@COS@CSNG@CSRLIN@CUSTOMTYPE@CVD@CVDMBF@CVI@CVL@CVS@CVSMBF@" +_
 "_GLCALLLIST@_GLCALLLISTS@_GLCLEAR@_GLCLEARACCUM@_GLCLEARCOLOR@_GLCLEARDEPTH@_GLCLEARINDEX@_GLCLEARSTENCIL@_GLCLIPPLANE@_GLCOLOR3B@_GLCOLOR3BV@_GLCOLOR3D@_GLCOLOR3DV@_GLCOLOR3F@_GLCOLOR3FV@_GLCOLOR3I@_GLCOLOR3IV@_GLCOLOR3S@_GLCOLOR3SV@_GLCOLOR3UB@_GLCOLOR3UBV@_GLCOLOR3UI@_GLCOLOR3UIV@_GLCOLOR3US@_GLCOLOR3USV@_GLCOLOR4B@_GLCOLOR4BV@_GLCOLOR4D@_GLCOLOR4DV@_GLCOLOR4F@_GLCOLOR4FV@_GLCOLOR4I@_GLCOLOR4IV@_GLCOLOR4S@_GLCOLOR4SV@_GLCOLOR4UB@_GLCOLOR4UBV@_GLCOLOR4UI@_GLCOLOR4UIV@_GLCOLOR4US@_GLCOLOR4USV@_GLCOLORMASK@_GLCOLORMATERIAL@_GLCOLORPOINTER@_GLCOPYPIXELS@_GLCOPYTEXIMAGE1D@_GLCOPYTEXIMAGE2D@_GLCOPYTEXSUBIMAGE1D@_GLCOPYTEXSUBIMAGE2D@_GLCULLFACE@"
 
diff --git a/tests/compile_tests/clngptr/clngptr_test.bas b/tests/compile_tests/clngptr/clngptr_test.bas
new file mode 100644
index 000000000..8b39a884b
--- /dev/null
+++ b/tests/compile_tests/clngptr/clngptr_test.bas
@@ -0,0 +1,33 @@
+$CONSOLE:ONLY
+OPTION _EXPLICIT
+
+DIM myArray(1 TO 10) AS LONG
+DIM i AS LONG
+
+FOR i = LBOUND(myArray) TO UBOUND(myArray)
+    myArray(i) = 2 ^ i
+NEXT i
+
+PrintArray myArray()
+
+DIM arrMem AS _MEM: arrMem = _MEM(myArray())
+
+FOR i = 0 TO (_CLNGPTR(arrMem.SIZE) \ _SIZE_OF_LONG) - 1
+    _MEMPUT arrMem, arrMem.OFFSET + (i * _SIZE_OF_LONG), i + 1 AS LONG
+NEXT i
+
+_MEMFREE arrMem
+
+PrintArray myArray()
+
+SYSTEM
+
+SUB PrintArray (arr() AS LONG)
+    DIM i AS LONG
+
+    PRINT "Array("; LBOUND(arr); "To"; UBOUND(arr); ") = {";
+    FOR i = LBOUND(arr) TO UBOUND(arr)
+        PRINT arr(i); _IIF(i < UBOUND(arr), ",", "");
+    NEXT i
+    PRINT "}"
+END SUB
diff --git a/tests/compile_tests/clngptr/clngptr_test.output b/tests/compile_tests/clngptr/clngptr_test.output
new file mode 100644
index 000000000..039f15a71
--- /dev/null
+++ b/tests/compile_tests/clngptr/clngptr_test.output
@@ -0,0 +1,2 @@
+Array( 1 To 10 ) = { 2 , 4 , 8 , 16 , 32 , 64 , 128 , 256 , 512 , 1024 }
+Array( 1 To 10 ) = { 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 }