diff --git a/source/qb64.bas b/source/qb64.bas
index 5cc0f9939..909bace67 100644
--- a/source/qb64.bas
+++ b/source/qb64.bas
@@ -659,7 +659,9 @@ TYPE idstruct
 
     callname AS STRING * 256
     ccall AS INTEGER
+    overloaded AS _BYTE
     args AS INTEGER
+    minargs AS INTEGER
     arg AS STRING * 400 'similar to t
     argsize AS STRING * 400 'similar to tsize (used for fixed length strings)
     specialformat AS STRING * 256
@@ -15680,7 +15682,8 @@ IF LEN(f$) THEN 'special format given
 ELSE 'no special format given
 
     IF n$ = "ASC" AND args = 2 THEN GOTO skipargnumchk
-    IF n$ = "_RGB32" AND (args > 0 AND args <= 4) THEN GOTO skipargnumchk
+    IF id2.overloaded = -1 AND (args >= id2.minargs AND args <= id2.args) THEN GOTO skipargnumchk
+
     IF id2.args <> args THEN Give_Error "Incorrect number of arguments passed to function": EXIT FUNCTION
 
 END IF
diff --git a/source/subs_functions/subs_functions.bas b/source/subs_functions/subs_functions.bas
index 458f0f1ba..fe3329054 100644
--- a/source/subs_functions/subs_functions.bas
+++ b/source/subs_functions/subs_functions.bas
@@ -1331,6 +1331,8 @@ clearid
 id.n = "_RGB32"
 id.subfunc = 1
 id.callname = "func__rgb32"
+id.overloaded = -1
+id.minargs = 1
 id.args = 4
 id.arg = MKL$(LONGTYPE - ISPOINTER) + MKL$(LONGTYPE - ISPOINTER) + MKL$(LONGTYPE - ISPOINTER) + MKL$(LONGTYPE - ISPOINTER)
 id.ret = ULONGTYPE - ISPOINTER