diff --git a/msi/Product.wxs b/msi/Product.wxs
index 086250300..59667f153 100644
--- a/msi/Product.wxs
+++ b/msi/Product.wxs
@@ -129,7 +129,7 @@
 
     <!-- database -->
     <DirectoryRef Id="database">
-      <Component Id="database" Guid="7D6149A8-11F7-4edf-ABC6-FF6944B18E72">
+      <Component Id="database" Guid="4DFE9A0D-CDDA-4CA8-8E1D-B4D852A83CEC">
         <File Id="Amm.dat"                               Name="Amm.dat"                               Source="..\database\Amm.dat" />
         <File Id="ColdChem.dat"                          Name="ColdChem.dat"                          Source="..\database\ColdChem.dat" />
         <File Id="Concrete_PHR.dat"                      Name="Concrete_PHR.dat"                      Source="..\database\Concrete_PHR.dat" />