diff --git a/spring-webflux/src/main/java/org/springframework/web/reactive/resource/ResourceTransformerSupport.java b/spring-webflux/src/main/java/org/springframework/web/reactive/resource/ResourceTransformerSupport.java
index 8beaf67c5aa..63c096d9707 100644
--- a/spring-webflux/src/main/java/org/springframework/web/reactive/resource/ResourceTransformerSupport.java
+++ b/spring-webflux/src/main/java/org/springframework/web/reactive/resource/ResourceTransformerSupport.java
@@ -96,7 +96,7 @@ public abstract class ResourceTransformerSupport implements ResourceTransformer
 	 */
 	protected String toAbsolutePath(String path, ServerWebExchange exchange) {
 		String requestPath = exchange.getRequest().getURI().getPath();
-		String absolutePath = StringUtils.applyRelativePath(requestPath, path);
+		String absolutePath = path.startsWith("/") ? path : StringUtils.applyRelativePath(requestPath, path);
 		return StringUtils.cleanPath(absolutePath);
 	}
 
diff --git a/spring-webflux/src/test/java/org/springframework/web/reactive/resource/ResourceTransformerSupportTests.java b/spring-webflux/src/test/java/org/springframework/web/reactive/resource/ResourceTransformerSupportTests.java
index 78a6cd1a613..2662196e771 100644
--- a/spring-webflux/src/test/java/org/springframework/web/reactive/resource/ResourceTransformerSupportTests.java
+++ b/spring-webflux/src/test/java/org/springframework/web/reactive/resource/ResourceTransformerSupportTests.java
@@ -106,6 +106,16 @@ public class ResourceTransformerSupportTests {
 		assertEquals("../bar-11e16cf79faee7ac698c805cf28248d2.css", actual);
 	}
 
+	@Test
+	public void toAbsolutePath() {
+		MockServerWebExchange exchange = MockServerWebExchange.from(MockServerHttpRequest.get("/resources/main.css"));
+		String absolute = this.transformer.toAbsolutePath("img/image.png", exchange);
+		assertEquals("/resources/img/image.png", absolute);
+
+		absolute = this.transformer.toAbsolutePath("/img/image.png", exchange);
+		assertEquals("/img/image.png", absolute);
+	}
+
 	private Resource getResource(String filePath) {
 		return new ClassPathResource("test/" + filePath, getClass());
 	}
diff --git a/spring-webmvc/src/main/java/org/springframework/web/servlet/resource/ResourceTransformerSupport.java b/spring-webmvc/src/main/java/org/springframework/web/servlet/resource/ResourceTransformerSupport.java
index b32fbae5315..98ec607d5d9 100644
--- a/spring-webmvc/src/main/java/org/springframework/web/servlet/resource/ResourceTransformerSupport.java
+++ b/spring-webmvc/src/main/java/org/springframework/web/servlet/resource/ResourceTransformerSupport.java
@@ -94,10 +94,13 @@ public abstract class ResourceTransformerSupport implements ResourceTransformer
 	 * @return the absolute request path for the given resource path
 	 */
 	protected String toAbsolutePath(String path, HttpServletRequest request) {
-		ResourceUrlProvider urlProvider = findResourceUrlProvider(request);
-		Assert.state(urlProvider != null, "No ResourceUrlProvider");
-		String requestPath = urlProvider.getUrlPathHelper().getRequestUri(request);
-		String absolutePath = StringUtils.applyRelativePath(requestPath, path);
+		String absolutePath = path;
+		if(!path.startsWith("/")) {
+			ResourceUrlProvider urlProvider = findResourceUrlProvider(request);
+			Assert.state(urlProvider != null, "No ResourceUrlProvider");
+			String requestPath = urlProvider.getUrlPathHelper().getRequestUri(request);
+			absolutePath = StringUtils.applyRelativePath(requestPath, path);
+		}
 		return StringUtils.cleanPath(absolutePath);
 	}
 
diff --git a/spring-webmvc/src/test/java/org/springframework/web/servlet/resource/ResourceTransformerSupportTests.java b/spring-webmvc/src/test/java/org/springframework/web/servlet/resource/ResourceTransformerSupportTests.java
index 33b807ac854..c18fc08601f 100644
--- a/spring-webmvc/src/test/java/org/springframework/web/servlet/resource/ResourceTransformerSupportTests.java
+++ b/spring-webmvc/src/test/java/org/springframework/web/servlet/resource/ResourceTransformerSupportTests.java
@@ -41,7 +41,7 @@ public class ResourceTransformerSupportTests {
 
 	private TestResourceTransformerSupport transformer;
 
-	private final MockHttpServletRequest request = new MockHttpServletRequest("GET", "");
+	private final MockHttpServletRequest request = new MockHttpServletRequest("GET", "/");
 
 
 	@Before
@@ -98,6 +98,17 @@ public class ResourceTransformerSupportTests {
 		assertEquals("../bar-11e16cf79faee7ac698c805cf28248d2.css", actual);
 	}
 
+	@Test
+	public void toAbsolutePath() {
+		String absolute = this.transformer.toAbsolutePath("img/image.png",
+				new MockHttpServletRequest("GET", "/resources/style.css"));
+		assertEquals("/resources/img/image.png", absolute);
+
+		absolute = this.transformer.toAbsolutePath("/img/image.png",
+				new MockHttpServletRequest("GET", "/resources/style.css"));
+		assertEquals("/img/image.png", absolute);
+	}
+
 	private Resource getResource(String filePath) {
 		return new ClassPathResource("test/" + filePath, getClass());
 	}