diff --git a/README.md b/README.md
index 9fe1c548..9a4b6467 100644
--- a/README.md
+++ b/README.md
@@ -123,6 +123,16 @@ jenkins.setAuthorizationStrategy(rbas)
 
 jenkins.save()
 ```
+
+### Case sensitive mode
+In previous versions of this plugin, role assignments where always matched case-sensitive, even when the security realm 
+works case-insensitive (as do most of them). As of version 685 the plugin will use the strategy given by the security realm 
+to match assigned roles. If for some reason you need the old behaviour, set the property `com.michelin.cio.hudson.plugins.rolestrategy.RoleMap.FORCE_CASE_SENSITIVE`
+via command line `jenkins -Dcom.michelin.cio.hudson.plugins.rolestrategy.RoleMap.FORCE_CASE_SENSITIVE=true -war jenkins.war`, set it via the script console or via 
+an init hook script.
+
+
+
 ## License
 
 [MIT License](./LICENSE.md)
diff --git a/src/main/java/com/michelin/cio/hudson/plugins/rolestrategy/RoleMap.java b/src/main/java/com/michelin/cio/hudson/plugins/rolestrategy/RoleMap.java
index ee41c965..9cf3db9a 100644
--- a/src/main/java/com/michelin/cio/hudson/plugins/rolestrategy/RoleMap.java
+++ b/src/main/java/com/michelin/cio/hudson/plugins/rolestrategy/RoleMap.java
@@ -41,6 +41,7 @@
 import hudson.security.AccessControlled;
 import hudson.security.AuthorizationStrategy;
 import hudson.security.Permission;
+import hudson.security.SecurityRealm;
 import hudson.security.SidACL;
 import java.util.ArrayList;
 import java.util.Collections;
@@ -60,6 +61,7 @@
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
+import jenkins.model.IdStrategy;
 import jenkins.model.Jenkins;
 import jenkins.model.ProjectNamingStrategy;
 import org.acegisecurity.acls.sid.PrincipalSid;
@@ -83,6 +85,10 @@
  */
 public class RoleMap {
 
+  @SuppressFBWarnings("MS_SHOULD_BE_FINAL") // Used to allow old behaviour
+  @Restricted(NoExternalUse.class)
+  public static boolean FORCE_CASE_SENSITIVE = Boolean.getBoolean(RoleMap.class.getName() + ".FORCE_CASE_SENSITIVE");
+
   /**
    * Map associating each {@link Role} with the concerned {@link User}s/groups.
    */
@@ -133,6 +139,9 @@ public RoleMap(@NonNull SortedMap<Role, Set<PermissionEntry>> grantedRoles) {
   public boolean hasPermission(PermissionEntry sid, Permission permission, RoleType roleType, AccessControlled controlledItem) {
     final Set<Permission> permissions = getImplyingPermissions(permission);
     final boolean[] hasPermission = { false };
+    final SecurityRealm securityRealm = Jenkins.get().getSecurityRealm();
+    final boolean principal = sid.getType() == AuthorizationType.USER;
+    final IdStrategy strategy = principal ? securityRealm.getUserIdStrategy() : securityRealm.getGroupIdStrategy();
 
     // Walk through the roles, and only add the roles having the given permission,
     // or a permission implying the given permission
@@ -149,12 +158,20 @@ public boolean hasPermission(PermissionEntry sid, Permission permission, RoleTyp
        */
       @CheckForNull
       private PermissionEntry hasPermission(Role current, PermissionEntry entry) {
-        if (grantedRoles.get(current).contains(entry)) {
+        Set<PermissionEntry> entries = grantedRoles.get(current);
+        if (entries.contains(entry)) {
           return entry;
         }
-        entry = new PermissionEntry(AuthorizationType.EITHER, entry.getSid());
-        if (grantedRoles.get(current).contains(entry)) {
-          return entry;
+        PermissionEntry eitherEntry = new PermissionEntry(AuthorizationType.EITHER, entry.getSid());
+        if (entries.contains(eitherEntry)) {
+          return eitherEntry;
+        }
+        if (!FORCE_CASE_SENSITIVE) {
+          for (PermissionEntry pe : entries) {
+            if (pe.isApplicable(principal) && strategy.equals(pe.getSid(), entry.getSid())) {
+              return pe;
+            }
+          }
         }
         return null;
       }
diff --git a/src/test/java/org/jenkinsci/plugins/rolestrategy/RoleStrategyTest.java b/src/test/java/org/jenkinsci/plugins/rolestrategy/RoleStrategyTest.java
index 196b4617..7255ac2f 100644
--- a/src/test/java/org/jenkinsci/plugins/rolestrategy/RoleStrategyTest.java
+++ b/src/test/java/org/jenkinsci/plugins/rolestrategy/RoleStrategyTest.java
@@ -2,9 +2,11 @@
 
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.is;
+import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
 import com.michelin.cio.hudson.plugins.rolestrategy.RoleBasedAuthorizationStrategy;
+import com.michelin.cio.hudson.plugins.rolestrategy.RoleMap;
 import com.synopsys.arc.jenkins.plugins.rolestrategy.RoleType;
 import hudson.PluginManager;
 import hudson.model.User;
@@ -31,11 +33,39 @@ public void initSecurityRealm() {
   @LocalData
   @Test
   public void testRoleAssignment() {
+    RoleMap.FORCE_CASE_SENSITIVE = false;
     try (ACLContext c = ACL.as(User.getById("alice", true))) {
       assertTrue(jenkinsRule.jenkins.hasPermission(Permission.READ));
     }
   }
 
+  @LocalData
+  @Test
+  public void testRoleAssignmentCaseInsensitiveNoMatchSucceeds() {
+    RoleMap.FORCE_CASE_SENSITIVE = false;
+    try (ACLContext c = ACL.as(User.getById("Alice", true))) {
+      assertTrue(jenkinsRule.jenkins.hasPermission(Permission.READ));
+    }
+  }
+
+  @LocalData
+  @Test
+  public void testRoleAssignmentCaseSensitiveMatch() {
+    RoleMap.FORCE_CASE_SENSITIVE = true;
+    try (ACLContext c = ACL.as(User.getById("alice", true))) {
+      assertTrue(jenkinsRule.jenkins.hasPermission(Permission.READ));
+    }
+  }
+
+  @LocalData
+  @Test
+  public void testRoleAssignmentCaseSensitiveNoMatchFails() {
+    RoleMap.FORCE_CASE_SENSITIVE = true;
+    try (ACLContext c = ACL.as(User.getById("Alice", true))) {
+      assertFalse(jenkinsRule.jenkins.hasPermission(Permission.READ));
+    }
+  }
+
   @LocalData
   @Test
   public void dangerousPermissionsAreIgnored() {
diff --git a/src/test/resources/org/jenkinsci/plugins/rolestrategy/RoleStrategyTest/testRoleAssignment/config.xml b/src/test/resources/org/jenkinsci/plugins/rolestrategy/RoleStrategyTest/config.xml
similarity index 100%
rename from src/test/resources/org/jenkinsci/plugins/rolestrategy/RoleStrategyTest/testRoleAssignment/config.xml
rename to src/test/resources/org/jenkinsci/plugins/rolestrategy/RoleStrategyTest/config.xml