diff --git a/Code/Network/RKObjectManager.m b/Code/Network/RKObjectManager.m
index 8fc4fcd9..38ef2531 100644
--- a/Code/Network/RKObjectManager.m
+++ b/Code/Network/RKObjectManager.m
@@ -18,6 +18,7 @@
 //  limitations under the License.
 //
 
+#import <objc/runtime.h>
 #import "RKObjectManager.h"
 #import "RKObjectParameterization.h"
 #import "RKManagedObjectStore.h"
@@ -88,6 +89,24 @@ static BOOL RKDoesArrayOfResponseDescriptorsContainEntityMapping(NSArray *respon
     return NO;
 }
 
+void RKAssociateBaseURLWithURL(NSURL *baseURL, NSURL *URL);
+NSURL *RKBaseURLAssociatedWithURL(NSURL *URL);
+
+static char kRKBaseURLAssociatedObjectKey;
+
+void RKAssociateBaseURLWithURL(NSURL *baseURL, NSURL *URL)
+{
+    objc_setAssociatedObject(URL,
+                             &kRKBaseURLAssociatedObjectKey,
+                             baseURL,
+                             OBJC_ASSOCIATION_COPY_NONATOMIC);
+}
+
+NSURL *RKBaseURLAssociatedWithURL(NSURL *URL)
+{
+    return objc_getAssociatedObject(URL, &kRKBaseURLAssociatedObjectKey);
+}
+
 ///////////////////////////////////
 
 @interface RKObjectManager ()
@@ -171,6 +190,11 @@ static BOOL RKDoesArrayOfResponseDescriptorsContainEntityMapping(NSArray *respon
     [request setHTTPMethod:method];
     [request setAllHTTPHeaderFields:self.HTTPClient.defaultHeaders];
     if (self.acceptHeaderValue) [request setValue:self.acceptHeaderValue forHTTPHeaderField:@"Accept"];
+    
+    /**
+     Associate our baseURL with the URL of the `NSURLRequest` object. This enables us to match response descriptors by path.
+     */
+    RKAssociateBaseURLWithURL(request.URL, self.HTTPClient.baseURL);
 
     if (parameters) {
         if ([method isEqualToString:@"GET"] || [method isEqualToString:@"HEAD"] || [method isEqualToString:@"DELETE"]) {
diff --git a/Code/Network/RKResponseMapperOperation.m b/Code/Network/RKResponseMapperOperation.m
index 0e7adb03..4430ffc8 100644
--- a/Code/Network/RKResponseMapperOperation.m
+++ b/Code/Network/RKResponseMapperOperation.m
@@ -31,6 +31,9 @@
 #undef RKLogComponent
 #define RKLogComponent lcl_cRestKitNetwork
 
+// Defined in RKObjectManager.h
+NSURL *RKBaseURLAssociatedWithURL(NSURL *URL);
+
 NSError *RKErrorFromMappingResult(RKMappingResult *mappingResult)
 {
     NSArray *collection = [mappingResult array];
@@ -54,6 +57,7 @@ NSError *RKErrorFromMappingResult(RKMappingResult *mappingResult)
 @property (nonatomic, strong, readwrite) RKMappingResult *mappingResult;
 @property (nonatomic, strong, readwrite) NSError *error;
 @property (nonatomic, strong, readwrite) NSDictionary *responseMappingsDictionary;
+@property (nonatomic, strong) NSString *relativeResponsePath;
 @end
 
 @interface RKResponseMapperOperation (ForSubclassEyesOnly)
@@ -76,11 +80,18 @@ NSError *RKErrorFromMappingResult(RKMappingResult *mappingResult)
         self.responseDescriptors = responseDescriptors;
         self.responseMappingsDictionary = [self buildResponseMappingsDictionary];
         self.treatsEmptyResponseAsSuccess = YES;
+        self.relativeResponsePath = [self buildRelativeResponsePath];
     }
 
     return self;
 }
 
+- (NSString *)buildRelativeResponsePath
+{
+    NSURL *baseURL = RKBaseURLAssociatedWithURL(self.response.URL);
+    return [[self.response.URL absoluteString] substringFromIndex:[[baseURL absoluteString] length]];
+}
+
 - (id)parseResponseData:(NSError **)error
 {
     NSString *MIMEType = [self.response MIMEType];
@@ -105,7 +116,7 @@ NSError *RKErrorFromMappingResult(RKMappingResult *mappingResult)
 {
     if (mappingDescriptor.pathPattern) {
         RKPathMatcher *pathMatcher = [RKPathMatcher matcherWithPattern:mappingDescriptor.pathPattern];
-        if (! [pathMatcher matchesPath:[self.response.URL relativePath] tokenizeQueryStrings:NO parsedArguments:nil]) {
+        if (! [pathMatcher matchesPath:self.relativeResponsePath tokenizeQueryStrings:NO parsedArguments:nil]) {
             return NO;
         }
     }