diff --git a/configtool.default.ini b/configtool.default.ini
index 1fd280e..5c887ab 100644
--- a/configtool.default.ini
+++ b/configtool.default.ini
@@ -23,7 +23,7 @@ cflags = -DF_CPU=%F_CPU% -mmcu=%CPU% -Wall -Wstrict-prototypes -std=gnu99
          -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums
          -Winline -fno-move-loop-invariants -fno-tree-scev-cprop -Os
          -ffunction-sections -finline-functions-called-once -mcall-prologues
-         -Wa,-adhlns=build/%ALNAME% -save-temps=obj
+         -Wa,-adhlns=%ALNAME% -save-temps=obj
 
 # Flags passed to avr-gcc to be passed on to the linker.
 ldflags = -Wl,--as-needed -Wl,--gc-sections
diff --git a/configtool/build.py b/configtool/build.py
index ab64313..abe8c3a 100644
--- a/configtool/build.py
+++ b/configtool/build.py
@@ -183,10 +183,11 @@ class Build(wx.Dialog):
       ofile = basename + ".o"
       alfile = basename + ".al"
       opath = "\"" + join(self.root, "build", ofile) + "\""
+      alpath = "\"" + join(self.root, "build", alfile) + "\""
       cpath = "\"" + join(self.root, f) + "\""
 
       opts = self.settings.cflags
-      opts = opts.replace("%ALNAME%", alfile)
+      opts = opts.replace("%ALNAME%", alpath)
       opts = opts.replace("%F_CPU%", self.f_cpu)
       opts = opts.replace("%CPU%", self.cpu)