diff --git a/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/web/reactive/server/WebFluxTags.java b/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/web/reactive/server/WebFluxTags.java
index 17b610c269..c50875a0b9 100644
--- a/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/web/reactive/server/WebFluxTags.java
+++ b/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/web/reactive/server/WebFluxTags.java
@@ -55,7 +55,7 @@ public final class WebFluxTags {
 	 * @return the method tag whose value is a capitalized method (e.g. GET).
 	 */
 	public static Tag method(ServerWebExchange exchange) {
-		return Tag.of("method", exchange.getRequest().getMethod().toString());
+		return Tag.of("method", exchange.getRequest().getMethodValue());
 	}
 
 	/**
diff --git a/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/web/reactive/server/WebFluxTagsTests.java b/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/web/reactive/server/WebFluxTagsTests.java
index 3ac3b54e16..9db50ef6b4 100644
--- a/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/web/reactive/server/WebFluxTagsTests.java
+++ b/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/metrics/web/reactive/server/WebFluxTagsTests.java
@@ -21,12 +21,16 @@ import org.junit.Before;
 import org.junit.Test;
 
 import org.springframework.http.HttpStatus;
+import org.springframework.http.server.reactive.ServerHttpRequest;
 import org.springframework.mock.http.server.reactive.MockServerHttpRequest;
 import org.springframework.mock.web.server.MockServerWebExchange;
 import org.springframework.web.reactive.HandlerMapping;
+import org.springframework.web.server.ServerWebExchange;
 import org.springframework.web.util.pattern.PathPatternParser;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.BDDMockito.given;
+import static org.mockito.Mockito.mock;
 
 /**
  * Tests for {@link WebFluxTags}.
@@ -80,4 +84,14 @@ public class WebFluxTagsTests {
 		assertThat(tag.getValue()).isEqualTo("UNKNOWN");
 	}
 
+	@Test
+	public void methodTagToleratesNonStandardHttpMethods() {
+		ServerWebExchange exchange = mock(ServerWebExchange.class);
+		ServerHttpRequest request = mock(ServerHttpRequest.class);
+		given(exchange.getRequest()).willReturn(request);
+		given(request.getMethodValue()).willReturn("CUSTOM");
+		Tag tag = WebFluxTags.method(exchange);
+		assertThat(tag.getValue()).isEqualTo("CUSTOM");
+	}
+
 }