diff --git a/tools/buildman/builder.py b/tools/buildman/builder.py
index 39a6e8ad5c73125f3486ced690522a692700e678..767b1f69284e77909fd7521babec7e6f88d0b1ac 100644
--- a/tools/buildman/builder.py
+++ b/tools/buildman/builder.py
@@ -431,7 +431,8 @@ class BuilderThread(threading.Thread):
                         result, request_config = self.RunCommit(commit_upto,
                             brd, work_dir, True, True, False)
                         did_config = True
-                do_config = request_config
+                if not self.builder.force_reconfig:
+                    do_config = request_config
 
                 # If we built that commit, then config is done. But if we got
                 # an warning, reconfig next time to force it to build the same
@@ -524,6 +525,12 @@ class Builder:
         toolchains: Toolchains object to use for building
         upto: Current commit number we are building (0.count-1)
         warned: Number of builds that produced at least one warning
+        force_reconfig: Reconfigure U-Boot on each comiit. This disables
+            incremental building, where buildman reconfigures on the first
+            commit for a baord, and then just does an incremental build for
+            the following commits. In fact buildman will reconfigure and
+            retry for any failing commits, so generally the only effect of
+            this option is to slow things down.
 
     Private members:
         _base_board_dict: Last-summarised Dict of boards
@@ -593,6 +600,7 @@ class Builder:
         self._next_delay_update = datetime.now()
         self.force_config_on_failure = True
         self.force_build_failures = False
+        self.force_reconfig = False
         self._step = step
 
         self.col = terminal.Color()
diff --git a/tools/buildman/buildman.py b/tools/buildman/buildman.py
index 0da6797e7f016a4c66ade07d60913f42446b17f3..5046b160e9ea5737d3716df8aa05bd2cc0af0072 100755
--- a/tools/buildman/buildman.py
+++ b/tools/buildman/buildman.py
@@ -67,6 +67,9 @@ parser.add_option('-B', '--bloat', dest='show_bloat',
        help='Show changes in function code size for each board')
 parser.add_option('-c', '--count', dest='count', type='int',
        default=-1, help='Run build on the top n commits')
+parser.add_option('-C', '--force-reconfig', dest='force_reconfig',
+       action='store_true', default=False,
+       help='Reconfigure for every commit (disable incremental build)')
 parser.add_option('-e', '--show_errors', action='store_true',
        default=False, help='Show errors and warnings')
 parser.add_option('-f', '--force-build', dest='force_build',
diff --git a/tools/buildman/control.py b/tools/buildman/control.py
index cfad535fcb316eb36aec590d2df7a6950fcf2a04..a737fd1bdc0d4629249bbbd281a3c6796d44da0e 100644
--- a/tools/buildman/control.py
+++ b/tools/buildman/control.py
@@ -157,6 +157,7 @@ def DoBuildman(options, args):
     else:
         builder.force_build = options.force_build
         builder.force_build_failures = options.force_build_failures
+        builder.force_reconfig = options.force_reconfig
 
         # Work out which boards to build
         board_selected = boards.GetSelectedDict()