diff --git a/src/libespeak-ng/synthdata.c b/src/libespeak-ng/synthdata.c
index 5c3428ab..644745f9 100644
--- a/src/libespeak-ng/synthdata.c
+++ b/src/libespeak-ng/synthdata.c
@@ -38,7 +38,7 @@
 #include "voice.h"
 #include "translate.h"
 
-const char *version_string = "1.48.15  16.Apr.15";
+const char *version_string = PACKAGE_VERSION;
 const int version_phdata  = 0x014801;
 
 // copy the current phoneme table into here
diff --git a/src/windows/installer/Product.wxs b/src/windows/installer/Product.wxs
index 6fb686a0..aa87abf2 100644
--- a/src/windows/installer/Product.wxs
+++ b/src/windows/installer/Product.wxs
@@ -13,7 +13,7 @@
 <?define PlatformProgramFilesFolder = "ProgramFilesFolder" ?>
 <?endif ?>
 <Wix xmlns="http://schemas.microsoft.com/wix/2006/wi">
-  <Product Id="3DA6DF03-E5CD-4A93-B06F-707484742BAB" Name="$(var.ProductDisplayName)" Language="1033" Version="1.48.15.0" Manufacturer="Cainteoir Technologies" UpgradeCode="B4F779EB-AC6C-49D2-A12D-4871E4520C0F">
+  <Product Id="3DA6DF03-E5CD-4A93-B06F-707484742BAB" Name="$(var.ProductDisplayName)" Language="1033" Version="$(var.ProductVersion)" Manufacturer="Cainteoir Technologies" UpgradeCode="B4F779EB-AC6C-49D2-A12D-4871E4520C0F">
     <Package InstallerVersion="200" Compressed="yes" InstallScope="perMachine" Platform="$(var.Platform)" />
 
     <MajorUpgrade DowngradeErrorMessage="A newer version of [ProductName] is already installed." />