diff --git a/docs/rh-log.txt b/docs/rh-log.txt
index 4137c7e71..2bf2931dc 100644
--- a/docs/rh-log.txt
+++ b/docs/rh-log.txt
@@ -1,4 +1,5 @@
 December 23, 2007 (Changes by Graf Zahl)
+- Added Karate Chris's 'sv_doubleammo' submission.
 - Added Karate Chris's 'Take' console command submission.
 - Changed DTA_Translation parameter for DrawTexture to an integer to avoid
   passing renderer specific data to the function. Also added DTA_Font so
diff --git a/src/d_main.cpp b/src/d_main.cpp
index 027fe59ff..1656fcfeb 100644
--- a/src/d_main.cpp
+++ b/src/d_main.cpp
@@ -388,6 +388,7 @@ CVAR (Flag, sv_nocrouch,		dmflags, DF_NO_CROUCH);
 
 CVAR (Int, dmflags2, 0, CVAR_SERVERINFO);
 CVAR (Flag, sv_weapondrop,		dmflags2, DF2_YES_WEAPONDROP);
+CVAR (Flag, sv_doubleammo,		dmflags2, DF2_YES_DOUBLEAMMO);
 CVAR (Flag, sv_nobfgaim,		dmflags2, DF2_NO_FREEAIMBFG);
 CVAR (Flag, sv_respawnprotect,	dmflags2, DF2_YES_INVUL);
 CVAR (Flag, sv_barrelrespawn,	dmflags2, DF2_BARRELS_RESPAWN);
diff --git a/src/doomdef.h b/src/doomdef.h
index c72423031..5d6f548b7 100644
--- a/src/doomdef.h
+++ b/src/doomdef.h
@@ -246,7 +246,7 @@ enum
 //#define DF2_YES_RUNEDROP		256		// Drop current rune upon death
 //#define DF2_YES_200MAX		512		// Don't all max. health/armor items to bring
 //										// health or armor over 200%
-//#define DF2_YES_DOUBLEAMMO	1024	// Doubles ammo like skill 1 and 5 do
+	DF2_YES_DOUBLEAMMO		= 1 << 10,	// Doubles ammo like skill 1 and 5 do
 //#define DF2_NO_CLEARFRAGS		2048	// Don't clear frags after each level
 //#define DF2_FORCE_NORESPAWN	4096	// Player cannot respawn
 //#define DF2_YES_DEGENERATION	8192	// Quake-style degeneration
diff --git a/src/g_shared/a_pickups.cpp b/src/g_shared/a_pickups.cpp
index a4f92a051..e10aeba37 100644
--- a/src/g_shared/a_pickups.cpp
+++ b/src/g_shared/a_pickups.cpp
@@ -82,6 +82,10 @@ bool AAmmo::HandlePickup (AInventory *item)
 				receiving = FixedMul(receiving, G_SkillProperty(SKILLP_AmmoFactor));
 			}
 			int oldamount = Amount;
+
+			if (dmflags2 & DF2_YES_DOUBLEAMMO)
+				receiving *= 2;
+
 			Amount += receiving;
 			if (Amount > MaxAmount)
 			{
diff --git a/src/m_options.cpp b/src/m_options.cpp
index 812f2a292..32dfb7ee0 100644
--- a/src/m_options.cpp
+++ b/src/m_options.cpp
@@ -1012,6 +1012,7 @@ static menuitem_t DMFlagsItems[] = {
 //	{ bitflag,	"Falling damage (old)",	{&dmflags},		{0}, {0}, {0}, {(value_t *)DF_FORCE_FALLINGZD} },
 //	{ bitflag,	"Falling damage (Hexen)",{&dmflags},	{0}, {0}, {0}, {(value_t *)DF_FORCE_FALLINGHX} },
 	{ bitflag,	"Drop weapon",			{&dmflags2},	{0}, {0}, {0}, {(value_t *)DF2_YES_WEAPONDROP} },
+	{ bitflag,	"Double ammo",			{&dmflags2},	{0}, {0}, {0}, {(value_t *)DF2_YES_DOUBLEAMMO} },
 	{ bitflag,	"Infinite ammo",		{&dmflags},		{0}, {0}, {0}, {(value_t *)DF_INFINITE_AMMO} },
 	{ bitflag,	"No monsters",			{&dmflags},		{0}, {0}, {0}, {(value_t *)DF_NO_MONSTERS} },
 	{ bitflag,	"Monsters respawn",		{&dmflags},		{0}, {0}, {0}, {(value_t *)DF_MONSTERS_RESPAWN} },