diff --git a/configtool/boardpanel.py b/configtool/boardpanel.py
index 0b85c09..0d75b85 100644
--- a/configtool/boardpanel.py
+++ b/configtool/boardpanel.py
@@ -157,7 +157,7 @@ class BoardPanel(wx.Panel):
     if not self.confirmLoseChanges("load a new board configuration"):
       return
 
-    if platform == "darwin":
+    if platform.startswith("darwin"):
       # Mac OS X appears to be a bit limited on wildcards.
       wildcard = "Board configuration (board.*.h)|*.h"
     else:
diff --git a/configtool/build.py b/configtool/build.py
index 74d023c..0289395 100644
--- a/configtool/build.py
+++ b/configtool/build.py
@@ -256,7 +256,7 @@ class Build(wx.Dialog):
     # Windows. Without this it always drops this error message:
     #   collect2.exe: error: ld returned 5 exit status 255
     # Just enabling verbose messages allows ld.exe to complete without failure.
-    if platform == "win32":
+    if platform.startswith("win"):
       cmdpath += " -Wl,-V"
 
     ofiles = ["\"" + join(self.root, "build", f) + "\""
diff --git a/configtool/data.py b/configtool/data.py
index 1a79412..e5f23fa 100644
--- a/configtool/data.py
+++ b/configtool/data.py
@@ -24,7 +24,7 @@ BSIZE = (100, 60)
 BSIZESMALL = (90, 30)
 
 
-if platform == "win32":
+if platform.startswith("win"):
   offsetTcLabel = 4
   offsetChLabel = 4
 else:
diff --git a/configtool/printerpanel.py b/configtool/printerpanel.py
index 297349c..7c91afd 100644
--- a/configtool/printerpanel.py
+++ b/configtool/printerpanel.py
@@ -140,7 +140,7 @@ class PrinterPanel(wx.Panel):
     if not self.confirmLoseChanges("load a new printer configuration"):
       return
 
-    if platform == "darwin":
+    if platform.startswith("darwin"):
       # Mac OS X appears to be a bit limited on wildcards.
       wildcard = "Printer configuration (printer.*.h)|*.h"
     else: