diff --git a/core/src/main/java/lucee/runtime/tag/ProcParamBean.java b/core/src/main/java/lucee/runtime/tag/ProcParamBean.java
index 770de75194..e7d91d8b6c 100755
--- a/core/src/main/java/lucee/runtime/tag/ProcParamBean.java
+++ b/core/src/main/java/lucee/runtime/tag/ProcParamBean.java
@@ -181,7 +181,9 @@ public Object getValueForCF() throws PageException {
 	@Override
 	public boolean isNulls() {
 		return getValue() == null
-				|| (sqlType != Types.VARCHAR && sqlType != Types.LONGVARCHAR && sqlType != Types.NVARCHAR && getValue() instanceof String && StringUtil.isEmpty(getValue()));
+				|| (sqlType != Types.VARCHAR && sqlType != Types.LONGVARCHAR && sqlType != Types.NVARCHAR 
+					&& sqlType != Types.NCHAR && sqlType != Types.CHAR
+					&& getValue() instanceof String && StringUtil.isEmpty(getValue()));
 	}
 
 	@Override
diff --git a/test/tickets/LDEV1917.cfc b/test/tickets/LDEV1917.cfc
index 54e30491bd..73148afb2a 100644
--- a/test/tickets/LDEV1917.cfc
+++ b/test/tickets/LDEV1917.cfc
@@ -4,10 +4,48 @@ component extends="org.lucee.cfml.test.LuceeTestCase" labels="mysql" {
 	}
 	function run( testResults , testBox ) {
 		if(!hasCredentials()) return;
-		describe( "test suite for LDEV-1917()", function() {
+		describe( "test suite for LDEV-1917", function() {
 			it(title = "cfprocparam passes null instead of empty strings with NVARCHAR cfsqltype", body = function( currentSpec ) {
 				local.result = _InternalRequest(
-					template:"#variables.uri#/test.cfm"
+					template:"#variables.uri#/test.cfm",
+					form: {
+						datatype: "nvarchar"
+					}
+				);
+				expect(local.result.filecontent.trim()).toBeTrue();
+			});
+
+			it(title = "cfprocparam passes null instead of empty strings with CHAR cfsqltype", body = function( currentSpec ) {
+				local.result = _InternalRequest(
+					template:"#variables.uri#/test.cfm",
+					form: {
+						datatype: "char"
+					}
+				);
+				expect(local.result.filecontent.trim()).toBeTrue();
+			});
+		});
+
+		describe( "test suite for LDEV-4645", function() {
+
+			it(title = "cfprocparam passes null instead of empty strings with NVARCHAR cfsqltype, col not null", body = function( currentSpec ) {
+				local.result = _InternalRequest(
+					template:"#variables.uri#/test.cfm",
+					form: {
+						datatype: "nvarchar",
+						notNull: true
+					}
+				);
+				expect(local.result.filecontent.trim()).toBeTrue();
+			});
+
+			it(title = "cfprocparam passes null instead of empty strings with CHAR cfsqltype, col not null", body = function( currentSpec ) {
+				local.result = _InternalRequest(
+					template:"#variables.uri#/test.cfm",
+					form: {
+						datatype: "char",
+						notNull: true
+					}
 				);
 				expect(local.result.filecontent.trim()).toBeTrue();
 			});
diff --git a/test/tickets/LDEV1917/Application.cfc b/test/tickets/LDEV1917/Application.cfc
index b1c1ff4e46..65882041cc 100644
--- a/test/tickets/LDEV1917/Application.cfc
+++ b/test/tickets/LDEV1917/Application.cfc
@@ -1,5 +1,12 @@
 component {
-	this.name = "ac";
+	this.name = "ldev-1917";
+
+	param name="form.datatype";
+	param name="form.notNull" default="false";
+
+
+	if (form.datatype neq "char" and form.datatype neq "nvarchar")
+		throw "bad datatype [#form.datatype#]";
 
 	mySQL = getCredentials();
 	if(mySQL.count()!=0){
@@ -8,9 +15,9 @@ component {
 	
 	public function onRequestStart() {
 		setting requesttimeout=10;
-	}
 
-	public function onApplicationStart() {
+		var extra= form.notNull ? " NOT NULL" : "";
+
 		query {
 			echo("DROP PROCEDURE IF EXISTS `LDEV1917SP`");
 		}
@@ -18,11 +25,11 @@ component {
 			echo("DROP TABLE IF EXISTS `LDEV1917`");
 		}
 		query {
-			echo("CREATE TABLE LDEV1917 (null_Value nvarchar(10))");
+			echo("CREATE TABLE LDEV1917 (null_Value #form.datatype#(10) #extra# )");
 		}
 		query {
 			echo("
-				CREATE PROCEDURE `LDEV1917SP`(IN null_Value nvarchar(10)) 
+				CREATE PROCEDURE `LDEV1917SP`(IN null_Value #form.datatype#(10)) 
 				BEGIN
 					INSERT INTO LDEV1917 VALUE(null_Value);
 				END
diff --git a/test/tickets/LDEV1917/test.cfm b/test/tickets/LDEV1917/test.cfm
index c85308c13e..346c74ffab 100644
--- a/test/tickets/LDEV1917/test.cfm
+++ b/test/tickets/LDEV1917/test.cfm
@@ -1,6 +1,6 @@
 
 <cfstoredproc procedure="LDEV1917SP">
-	<cfprocparam type = "IN"   CFSQLType = "NVARCHAR" value = "" null=false>
+	<cfprocparam type = "IN"   CFSQLType = "#form.datatype#" value = "" null=false>
 </cfstoredproc>
 <cfquery name="test1917">
 	select * from LDEV1917