diff --git a/Docs/src/bin/halibut/halibut.h b/Docs/src/bin/halibut/halibut.h
index dfbbe2bf..67735d53 100644
--- a/Docs/src/bin/halibut/halibut.h
+++ b/Docs/src/bin/halibut/halibut.h
@@ -268,6 +268,7 @@ void licence(void);
 /*
  * version.c
  */
+void initversionstring(void);
 const char *const version;
 
 /*
diff --git a/Docs/src/bin/halibut/main.c b/Docs/src/bin/halibut/main.c
index f82414f5..2b413d9e 100644
--- a/Docs/src/bin/halibut/main.c
+++ b/Docs/src/bin/halibut/main.c
@@ -21,6 +21,8 @@ int main(int argc, char **argv)
   int reportcols;
   int debug;
 
+  initversionstring();
+
   /*
    * Set up initial (default) parameters.
    */
diff --git a/Docs/src/bin/halibut/version.c b/Docs/src/bin/halibut/version.c
index 634bedcf..1b46fc8f 100644
--- a/Docs/src/bin/halibut/version.c
+++ b/Docs/src/bin/halibut/version.c
@@ -3,6 +3,8 @@
  */
 
 #include <stdio.h>
+#include <ctype.h>
+#include <string.h>
 
 #ifndef VERSION
 #define VER "anonymous build (" __DATE__ " " __TIME__ ")"
@@ -10,4 +12,31 @@
 #define VER "version " VERSION
 #endif
 
-const char *const version = "version 1.0 (NSIS Custom Build)";
+#define VERSTRFMT "v1.0 (NSIS Custom Build, %s)"
+#define VERSTRSCMREVMAX 20
+
+static char versionbuf[sizeof(VERSTRFMT)-2+VERSTRSCMREVMAX];
+const char *const version = versionbuf;
+
+void initversionstring(void)
+{
+  char scmverbuf[VERSTRSCMREVMAX+1];
+  int cchsvnrev = 0;
+  const char*svnproprev = "$Revision$";
+  if ('$' == *svnproprev++)
+  {
+    const char*p;
+    while('$' != *svnproprev && !isdigit(*svnproprev)) svnproprev++;
+    for (p = svnproprev; isdigit(*p); ++p) cchsvnrev++;
+  }
+  if (!cchsvnrev)
+  {
+    cchsvnrev = 1;
+    svnproprev = "?";
+  }
+
+  strcpy(scmverbuf, "SVN:r");
+  strncat(scmverbuf, svnproprev, cchsvnrev);
+  sprintf(versionbuf,VERSTRFMT,scmverbuf);
+}
+