diff --git a/oauth2/oauth2-resource-server/src/main/java/org/springframework/security/oauth2/server/resource/authentication/JwtGrantedAuthoritiesConverter.java b/oauth2/oauth2-resource-server/src/main/java/org/springframework/security/oauth2/server/resource/authentication/JwtGrantedAuthoritiesConverter.java
index 5fcab4f46e..ab020a3fc8 100644
--- a/oauth2/oauth2-resource-server/src/main/java/org/springframework/security/oauth2/server/resource/authentication/JwtGrantedAuthoritiesConverter.java
+++ b/oauth2/oauth2-resource-server/src/main/java/org/springframework/security/oauth2/server/resource/authentication/JwtGrantedAuthoritiesConverter.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -45,14 +45,10 @@ public final class JwtGrantedAuthoritiesConverter implements Converter<Jwt, Coll
 
 	private static final String DEFAULT_AUTHORITY_PREFIX = "SCOPE_";
 
-	private static final String DEFAULT_AUTHORITIES_SPLIT_REGEX = " ";
-
 	private static final Collection<String> WELL_KNOWN_AUTHORITIES_CLAIM_NAMES = Arrays.asList("scope", "scp");
 
 	private String authorityPrefix = DEFAULT_AUTHORITY_PREFIX;
 
-	private String authoritiesSplitRegex = DEFAULT_AUTHORITIES_SPLIT_REGEX;
-
 	private String authoritiesClaimName;
 
 	/**
@@ -81,18 +77,6 @@ public final class JwtGrantedAuthoritiesConverter implements Converter<Jwt, Coll
 		this.authorityPrefix = authorityPrefix;
 	}
 
-	/**
-	 * Sets the regex to use for splitting the value of the authorities claim into
-	 * {@link GrantedAuthority authorities}. Defaults to
-	 * {@link JwtGrantedAuthoritiesConverter#DEFAULT_AUTHORITIES_SPLIT_REGEX}.
-	 * @param authoritiesSplitRegex The regex used to split the authorities
-	 * @since 6.1
-	 */
-	public void setAuthoritiesSplitRegex(String authoritiesSplitRegex) {
-		Assert.notNull(authoritiesSplitRegex, "authoritiesSplitRegex cannot be null");
-		this.authoritiesSplitRegex = authoritiesSplitRegex;
-	}
-
 	/**
 	 * Sets the name of token claim to use for mapping {@link GrantedAuthority
 	 * authorities} by this converter. Defaults to
@@ -129,7 +113,7 @@ public final class JwtGrantedAuthoritiesConverter implements Converter<Jwt, Coll
 		Object authorities = jwt.getClaim(claimName);
 		if (authorities instanceof String) {
 			if (StringUtils.hasText((String) authorities)) {
-				return Arrays.asList(((String) authorities).split(this.authoritiesSplitRegex));
+				return Arrays.asList(((String) authorities).split(" "));
 			}
 			return Collections.emptyList();
 		}
diff --git a/oauth2/oauth2-resource-server/src/test/java/org/springframework/security/oauth2/server/resource/authentication/JwtGrantedAuthoritiesConverterTests.java b/oauth2/oauth2-resource-server/src/test/java/org/springframework/security/oauth2/server/resource/authentication/JwtGrantedAuthoritiesConverterTests.java
index d3ba0c2b50..ff3cc30b8a 100644
--- a/oauth2/oauth2-resource-server/src/test/java/org/springframework/security/oauth2/server/resource/authentication/JwtGrantedAuthoritiesConverterTests.java
+++ b/oauth2/oauth2-resource-server/src/test/java/org/springframework/security/oauth2/server/resource/authentication/JwtGrantedAuthoritiesConverterTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -256,18 +256,4 @@ public class JwtGrantedAuthoritiesConverterTests {
 		assertThat(authorities).isEmpty();
 	}
 
-	@Test
-	public void convertWithCustomAuthoritiesSplitRegexWhenTokenHasScopeAttributeThenTranslatedToAuthorities() {
-		// @formatter:off
-		Jwt jwt = TestJwts.jwt()
-				.claim("scope", "message:read,message:write")
-				.build();
-		// @formatter:on
-		JwtGrantedAuthoritiesConverter jwtGrantedAuthoritiesConverter = new JwtGrantedAuthoritiesConverter();
-		jwtGrantedAuthoritiesConverter.setAuthoritiesSplitRegex(",");
-		Collection<GrantedAuthority> authorities = jwtGrantedAuthoritiesConverter.convert(jwt);
-		assertThat(authorities).containsExactly(new SimpleGrantedAuthority("SCOPE_message:read"),
-				new SimpleGrantedAuthority("SCOPE_message:write"));
-	}
-
 }