diff --git a/bitbake/bin/bitbake-diffsigs b/bitbake/bin/bitbake-diffsigs
index e3f848d0ed..e9fdb48993 100755
--- a/bitbake/bin/bitbake-diffsigs
+++ b/bitbake/bin/bitbake-diffsigs
@@ -34,7 +34,7 @@ import bb.msg
 
 logger = bb.msg.logger_create('bitbake-diffsigs')
 
-def find_compare_task(bbhandler, pn, taskname):
+def find_compare_task(bbhandler, pn, taskname, sig1=None, sig2=None):
     """ Find the most recent signature files for the specified PN/task and compare them """
 
     if not hasattr(bb.siggen, 'find_siginfo'):
@@ -44,41 +44,54 @@ def find_compare_task(bbhandler, pn, taskname):
     if not taskname.startswith('do_'):
         taskname = 'do_%s' % taskname
 
-    filedates = bb.siggen.find_siginfo(pn, taskname, None, bbhandler.config_data)
-    latestfiles = sorted(filedates.keys(), key=lambda f: filedates[f])[-3:]
-    if not latestfiles:
-        logger.error('No sigdata files found matching %s %s' % (pn, taskname))
-        sys.exit(1)
-    elif len(latestfiles) < 2:
-        logger.error('Only one matching sigdata file found for the specified task (%s %s)' % (pn, taskname))
-        sys.exit(1)
+    if sig1 and sig2:
+        sigfiles = bb.siggen.find_siginfo(pn, taskname, [sig1, sig2], bbhandler.config_data)
+        if len(sigfiles) == 0:
+            logger.error('No sigdata files found matching %s %s matching either %s or %s' % (pn, taskname, sig1, sig2))
+            sys.exit(1)
+        elif not sig1 in sigfiles:
+            logger.error('No sigdata files found matching %s %s with signature %s' % (pn, taskname, sig1))
+            sys.exit(1)
+        elif not sig2 in sigfiles:
+            logger.error('No sigdata files found matching %s %s with signature %s' % (pn, taskname, sig2))
+            sys.exit(1)
+        latestfiles = [sigfiles[sig1], sigfiles[sig2]]
     else:
-        # Define recursion callback
-        def recursecb(key, hash1, hash2):
-            hashes = [hash1, hash2]
-            hashfiles = bb.siggen.find_siginfo(key, None, hashes, bbhandler.config_data)
+        filedates = bb.siggen.find_siginfo(pn, taskname, None, bbhandler.config_data)
+        latestfiles = sorted(filedates.keys(), key=lambda f: filedates[f])[-3:]
+        if not latestfiles:
+            logger.error('No sigdata files found matching %s %s' % (pn, taskname))
+            sys.exit(1)
+        elif len(latestfiles) < 2:
+            logger.error('Only one matching sigdata file found for the specified task (%s %s)' % (pn, taskname))
+            sys.exit(1)
 
-            recout = []
-            if len(hashfiles) == 0:
-                recout.append("Unable to find matching sigdata for %s with hashes %s or %s" % (key, hash1, hash2))
-            elif not hash1 in hashfiles:
-                recout.append("Unable to find matching sigdata for %s with hash %s" % (key, hash1))
-            elif not hash2 in hashfiles:
-                recout.append("Unable to find matching sigdata for %s with hash %s" % (key, hash2))
-            else:
-                out2 = bb.siggen.compare_sigfiles(hashfiles[hash1], hashfiles[hash2], recursecb)
-                for change in out2:
-                    for line in change.splitlines():
-                        recout.append('  ' + line)
+    # Define recursion callback
+    def recursecb(key, hash1, hash2):
+        hashes = [hash1, hash2]
+        hashfiles = bb.siggen.find_siginfo(key, None, hashes, bbhandler.config_data)
 
-            return recout
+        recout = []
+        if len(hashfiles) == 0:
+            recout.append("Unable to find matching sigdata for %s with hashes %s or %s" % (key, hash1, hash2))
+        elif not hash1 in hashfiles:
+            recout.append("Unable to find matching sigdata for %s with hash %s" % (key, hash1))
+        elif not hash2 in hashfiles:
+            recout.append("Unable to find matching sigdata for %s with hash %s" % (key, hash2))
+        else:
+            out2 = bb.siggen.compare_sigfiles(hashfiles[hash1], hashfiles[hash2], recursecb)
+            for change in out2:
+                for line in change.splitlines():
+                    recout.append('  ' + line)
 
-        # Recurse into signature comparison
-        logger.debug("Signature file (previous): %s" % latestfiles[-2])
-        logger.debug("Signature file (latest): %s" % latestfiles[-1])
-        output = bb.siggen.compare_sigfiles(latestfiles[-2], latestfiles[-1], recursecb)
-        if output:
-            print('\n'.join(output))
+        return recout
+
+    # Recurse into signature comparison
+    logger.debug("Signature file (previous): %s" % latestfiles[-2])
+    logger.debug("Signature file (latest): %s" % latestfiles[-1])
+    output = bb.siggen.compare_sigfiles(latestfiles[-2], latestfiles[-1], recursecb)
+    if output:
+        print('\n'.join(output))
     sys.exit(0)
 
 
@@ -94,6 +107,10 @@ parser.add_argument("-t", "--task",
         help="find the signature data files for last two runs of the specified task and compare them",
         action="store", dest="taskargs", nargs=2, metavar=('recipename', 'taskname'))
 
+parser.add_argument("-s", "--signature",
+        help="With -t/--task, specify the signatures to look for instead of taking the last two",
+        action="store", dest="sigargs", nargs=2, metavar=('fromsig', 'tosig'))
+
 parser.add_argument("sigdatafile1",
         help="First signature file to compare (or signature file to dump, if second not specified). Not used when using -t/--task.",
         action="store", nargs='?')
@@ -111,8 +128,14 @@ if options.debug:
 if options.taskargs:
     with bb.tinfoil.Tinfoil() as tinfoil:
         tinfoil.prepare(config_only=True)
-        find_compare_task(tinfoil, options.taskargs[0], options.taskargs[1])
+        if options.sigargs:
+            find_compare_task(tinfoil, options.taskargs[0], options.taskargs[1], options.sigargs[0], options.sigargs[1])
+        else:
+            find_compare_task(tinfoil, options.taskargs[0], options.taskargs[1])
 else:
+    if options.sigargs:
+        logger.error('-s/--signature can only be used together with -t/--task')
+        sys.exit(1)
     try:
         if options.sigdatafile1 and options.sigdatafile2:
             output = bb.siggen.compare_sigfiles(options.sigdatafile1, options.sigdatafile2)