diff --git a/engine/common/build.c b/engine/common/build.c
index 62fe9bfe..d124f18d 100644
--- a/engine/common/build.c
+++ b/engine/common/build.c
@@ -19,11 +19,9 @@ static char *date = __DATE__ ;
 static char *mon[12] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
 static char mond[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
 
-// returns days since Feb 13 2007
+// returns days since Apr 1 2015
 int Q_buildnum( void )
 {
-// do not touch this! Only author of Xash3D can increase buildnumbers!
-#if 0 
 	int m = 0, d = 0, y = 0;
 	static int b = 0;
 
@@ -44,12 +42,24 @@ int Q_buildnum( void )
 	{
 		b += 1;
 	}
-	b -= 38752; // Feb 13 2007
+	b -= 41728; // Apr 1 2015
 
 	return b;
-#else
+}
+
+/*
+=============
+Q_buildnum_compat
+
+Returns a Xash3D build number. This is left for compability with original Xash3D.
+IMPORTANT: this value must be changed ONLY after updating to newer Xash3D
+IMPORTANT: this value must be acquired through "build" cvar.
+=============
+*/
+int Q_buildnum_compat( void )
+{
+	// do not touch this! Only author of Xash3D can increase buildnumbers!
 	return 4529;
-#endif
 }
 
 /*
diff --git a/engine/common/common.h b/engine/common/common.h
index a4e7ae54..b1fdd635 100644
--- a/engine/common/common.h
+++ b/engine/common/common.h
@@ -119,7 +119,8 @@ typedef enum
 #include "con_nprint.h"
 #include "crclib.h"
 
-#define XASH_VERSION	"0.99"		// engine current version
+#define XASH_VERSION        "0.20" // engine current version
+#define XASH_COMPAT_VERSION "0.99" // version we are based on
 
 // PERFORMANCE INFO
 #define MIN_FPS         20.0f		// host minimum fps value for maxfps.
@@ -664,6 +665,7 @@ uint Sound_GetApproxWavePlayLen( const char *filepath );
 // build.c
 //
 int Q_buildnum( void );
+int Q_buildnum_compat( void );
 const char *Q_buildos( void );
 const char *Q_buildarch( void );
 const char *Q_buildcommit( void );
diff --git a/engine/common/host.c b/engine/common/host.c
index a1ef6cea..fb5b5d08 100644
--- a/engine/common/host.c
+++ b/engine/common/host.c
@@ -960,10 +960,8 @@ int EXPORT Host_Main( int argc, char **argv, const char *progname, int bChangeGa
 	host_limitlocal = Cvar_Get( "host_limitlocal", "0", 0, "apply cl_cmdrate and rate to loopback connection" );
 	con_gamemaps = Cvar_Get( "con_mapfilter", "1", FCVAR_ARCHIVE, "when true show only maps in game folder" );
 
-	build = Cvar_Get( "buildnum", va( "%i", Q_buildnum()), FCVAR_READ_ONLY, "returns a current build number" );
-
-	ver = Cvar_Get( "ver", va( "%i/%s (hw build %i)", PROTOCOL_VERSION, XASH_VERSION, Q_buildnum()), FCVAR_READ_ONLY, "shows an engine version" );
-
+	build = Cvar_Get( "buildnum", va( "%i", Q_buildnum_compat()), FCVAR_READ_ONLY, "returns a current build number" );
+	ver = Cvar_Get( "ver", va( "%i/%s (hw build %i)", PROTOCOL_VERSION, XASH_COMPAT_VERSION, Q_buildnum_compat()), FCVAR_READ_ONLY, "shows an engine version" );
 	Cvar_Get( "host_ver", va( "%i %s %s %s %s", Q_buildnum(), XASH_VERSION, Q_buildos(), Q_buildarch(), Q_buildcommit() ), FCVAR_READ_ONLY, "detailed info about this build" );
 
 	Mod_Init();