diff --git a/webapp/src/edu/cornell/mannlib/vitro/webapp/controller/accounts/UserAccountsSelector.java b/webapp/src/edu/cornell/mannlib/vitro/webapp/controller/accounts/UserAccountsSelector.java
index b597479d2..ef5395505 100644
--- a/webapp/src/edu/cornell/mannlib/vitro/webapp/controller/accounts/UserAccountsSelector.java
+++ b/webapp/src/edu/cornell/mannlib/vitro/webapp/controller/accounts/UserAccountsSelector.java
@@ -184,7 +184,7 @@ public class UserAccountsSelector {
 		if (!roleFilterUri.isEmpty()) {
 			String clean = escapeForRegex(roleFilterUri);
 			filters += "OPTIONAL { ?uri auth:hasPermissionSet ?role } \n"
-					+ "    FILTER (REGEX(str(?role), '" + clean + "'))";
+					+ "    FILTER (REGEX(str(?role), '^" + clean + "$'))";
 		}
 
 		if ((!roleFilterUri.isEmpty()) && (!searchTerm.isEmpty())) {
diff --git a/webapp/test/edu/cornell/mannlib/vitro/webapp/controller/accounts/UserAccountsSelectorTest.java b/webapp/test/edu/cornell/mannlib/vitro/webapp/controller/accounts/UserAccountsSelectorTest.java
index 5194dfd7c..6132579e3 100644
--- a/webapp/test/edu/cornell/mannlib/vitro/webapp/controller/accounts/UserAccountsSelectorTest.java
+++ b/webapp/test/edu/cornell/mannlib/vitro/webapp/controller/accounts/UserAccountsSelectorTest.java
@@ -267,6 +267,12 @@ public class UserAccountsSelectorTest extends AbstractTestClass {
 				"user09");
 	}
 
+	@Test
+	public void filterAgainstRole2() {
+		selectOnCriteria(20, 1, DEFAULT_ORDERING, NS_MINE + "role2", "");
+		assertSelectedUris(2, "user03", "user10");
+	}
+	
 	@Test
 	public void filterAgainstNoSuchRole() {
 		selectOnCriteria(20, 1, DEFAULT_ORDERING, "BogusRole", "");
diff --git a/webapp/test/edu/cornell/mannlib/vitro/webapp/controller/accounts/UserAccountsSelectorTest.n3 b/webapp/test/edu/cornell/mannlib/vitro/webapp/controller/accounts/UserAccountsSelectorTest.n3
index c6c8fe097..15f41d4dd 100644
--- a/webapp/test/edu/cornell/mannlib/vitro/webapp/controller/accounts/UserAccountsSelectorTest.n3
+++ b/webapp/test/edu/cornell/mannlib/vitro/webapp/controller/accounts/UserAccountsSelectorTest.n3
@@ -103,7 +103,7 @@ mydomain:user07
 	auth:loginCount 1 ;
 #	auth:lastLoginTime NONE ;
 #	auth:status NONE ;
-	auth:hasPermissionSet mydomain:role2 ;
+	auth:hasPermissionSet mydomain:role22 ;
 	.
 	
 mydomain:user08
@@ -155,3 +155,10 @@ mydomain:role2
 	rdfs:label "Role 2" ;
 	.
 	
+# this is intentionally a typographical extension of mydomain:role2 
+#    to test that our reg-exp filters correctly.
+mydomain:role22
+	a auth:PermissionSet ;
+	rdfs:label "Role 22" ;
+	.
+