diff --git a/src/c_cvars.cpp b/src/c_cvars.cpp
index 36e3d576b..c8f1ee4c6 100644
--- a/src/c_cvars.cpp
+++ b/src/c_cvars.cpp
@@ -1488,6 +1488,44 @@ FBaseCVar *FindCVarSub (const char *var_name, int namelen)
 	return var;
 }
 
+FBaseCVar *GetCVar(AActor *activator, const char *cvarname)
+{
+	FBaseCVar *cvar = FindCVar(cvarname, nullptr);
+	// Either the cvar doesn't exist, or it's for a mod that isn't loaded, so return nullptr.
+	if (cvar == nullptr || (cvar->GetFlags() & CVAR_IGNORE))
+	{
+		return nullptr;
+	}
+	else
+	{
+		// For userinfo cvars, redirect to GetUserCVar
+		if (cvar->GetFlags() & CVAR_USERINFO)
+		{
+			if (activator == nullptr || activator->player == nullptr)
+			{
+				return nullptr;
+			}
+			return GetUserCVar(int(activator->player - players), cvarname);
+		}
+		return cvar;
+	}
+}
+
+FBaseCVar *GetUserCVar(int playernum, const char *cvarname)
+{
+	if ((unsigned)playernum >= MAXPLAYERS || !playeringame[playernum])
+	{
+		return nullptr;
+	}
+	FBaseCVar **cvar_p = players[playernum].userinfo.CheckKey(FName(cvarname, true));
+	FBaseCVar *cvar;
+	if (cvar_p == nullptr || (cvar = *cvar_p) == nullptr || (cvar->GetFlags() & CVAR_IGNORE))
+	{
+		return nullptr;
+	}
+	return cvar;
+}
+
 //===========================================================================
 //
 // C_CreateCVar
diff --git a/src/c_cvars.h b/src/c_cvars.h
index 59a3208d1..be7676e89 100644
--- a/src/c_cvars.h
+++ b/src/c_cvars.h
@@ -186,6 +186,10 @@ void C_BackupCVars (void);
 FBaseCVar *FindCVar (const char *var_name, FBaseCVar **prev);
 FBaseCVar *FindCVarSub (const char *var_name, int namelen);
 
+// Used for ACS and DECORATE.
+FBaseCVar *GetCVar(AActor *activator, const char *cvarname);
+FBaseCVar *GetUserCVar(int playernum, const char *cvarname);
+
 // Create a new cvar with the specified name and type
 FBaseCVar *C_CreateCVar(const char *var_name, ECVarType var_type, DWORD flags);
 
diff --git a/src/p_acs.cpp b/src/p_acs.cpp
index ca5e41757..29c9fe8fe 100644
--- a/src/p_acs.cpp
+++ b/src/p_acs.cpp
@@ -4657,7 +4657,11 @@ static int DoGetCVar(FBaseCVar *cvar, bool is_string)
 {
 	UCVarValue val;
 
-	if (is_string)
+	if (cvar == nullptr)
+	{
+		return 0;
+	}
+	else if (is_string)
 	{
 		val = cvar->GetGenericRep(CVAR_String);
 		return GlobalACSStrings.AddString(val.String);
@@ -4674,44 +4678,6 @@ static int DoGetCVar(FBaseCVar *cvar, bool is_string)
 	}
 }
 
-static int GetUserCVar(int playernum, const char *cvarname, bool is_string)
-{
-	if ((unsigned)playernum >= MAXPLAYERS || !playeringame[playernum])
-	{
-		return 0;
-	}
-	FBaseCVar **cvar_p = players[playernum].userinfo.CheckKey(FName(cvarname, true));
-	FBaseCVar *cvar;
-	if (cvar_p == NULL || (cvar = *cvar_p) == NULL || (cvar->GetFlags() & CVAR_IGNORE))
-	{
-		return 0;
-	}
-	return DoGetCVar(cvar, is_string);
-}
-
-static int GetCVar(AActor *activator, const char *cvarname, bool is_string)
-{
-	FBaseCVar *cvar = FindCVar(cvarname, NULL);
-	// Either the cvar doesn't exist, or it's for a mod that isn't loaded, so return 0.
-	if (cvar == NULL || (cvar->GetFlags() & CVAR_IGNORE))
-	{
-		return 0;
-	}
-	else
-	{
-		// For userinfo cvars, redirect to GetUserCVar
-		if (cvar->GetFlags() & CVAR_USERINFO)
-		{
-			if (activator == NULL || activator->player == NULL)
-			{
-				return 0;
-			}
-			return GetUserCVar(int(activator->player - players), cvarname, is_string);
-		}
-		return DoGetCVar(cvar, is_string);
-	}
-}
-
 static int SetUserCVar(int playernum, const char *cvarname, int value, bool is_string)
 {
 	if ((unsigned)playernum >= MAXPLAYERS || !playeringame[playernum])
@@ -5396,7 +5362,7 @@ int DLevelScript::CallFunction(int argCount, int funcIndex, SDWORD *args)
 		case ACSF_GetCVarString:
 			if (argCount == 1)
 			{
-				return GetCVar(activator, FBehavior::StaticLookupString(args[0]), true);
+				return DoGetCVar(GetCVar(activator, FBehavior::StaticLookupString(args[0])), true);
 			}
 			break;
 
@@ -5417,14 +5383,14 @@ int DLevelScript::CallFunction(int argCount, int funcIndex, SDWORD *args)
 		case ACSF_GetUserCVar:
 			if (argCount == 2)
 			{
-				return GetUserCVar(args[0], FBehavior::StaticLookupString(args[1]), false);
+				return DoGetCVar(GetUserCVar(args[0], FBehavior::StaticLookupString(args[1])), false);
 			}
 			break;
 
 		case ACSF_GetUserCVarString:
 			if (argCount == 2)
 			{
-				return GetUserCVar(args[0], FBehavior::StaticLookupString(args[1]), true);
+				return DoGetCVar(GetUserCVar(args[0], FBehavior::StaticLookupString(args[1])), true);
 			}
 			break;
 
@@ -9132,7 +9098,7 @@ scriptwait:
 			break;
 
 		case PCD_GETCVAR:
-			STACK(1) = GetCVar(activator, FBehavior::StaticLookupString(STACK(1)), false);
+			STACK(1) = DoGetCVar(GetCVar(activator, FBehavior::StaticLookupString(STACK(1))), false);
 			break;
 
 		case PCD_SETHUDSIZE:
diff --git a/src/thingdef/thingdef_codeptr.cpp b/src/thingdef/thingdef_codeptr.cpp
index 80e8226f6..dbbb12f6a 100644
--- a/src/thingdef/thingdef_codeptr.cpp
+++ b/src/thingdef/thingdef_codeptr.cpp
@@ -513,6 +513,36 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, GetCrouchFactor)
 	return 0;
 }
 
+//==========================================================================
+//
+// GetCVar
+//
+// NON-ACTION function that works like ACS's GetCVar.
+//
+//==========================================================================
+
+DEFINE_ACTION_FUNCTION_PARAMS(AActor, GetCVar)
+{
+	if (numret > 0)
+	{
+		assert(ret != nullptr);
+		PARAM_SELF_PROLOGUE(AActor);
+		PARAM_STRING(cvarname);
+
+		FBaseCVar *cvar = GetCVar(self, cvarname);
+		if (cvar == nullptr)
+		{
+			ret->SetFloat(0);
+		}
+		else
+		{
+			ret->SetFloat(cvar->GetGenericRep(CVAR_Float).Float);
+		}
+		return 1;
+	}
+	return 0;
+}
+
 //===========================================================================
 //
 // __decorate_internal_state__
diff --git a/wadsrc/static/actors/actor.txt b/wadsrc/static/actors/actor.txt
index 6606f8a49..5c46d0d4b 100644
--- a/wadsrc/static/actors/actor.txt
+++ b/wadsrc/static/actors/actor.txt
@@ -47,6 +47,7 @@ ACTOR Actor native //: Thinker
 	native int GetSpawnHealth();
 	native int GetGibHealth();
 	native float GetCrouchFactor(int ptr = AAPTR_PLAYER1);
+	native float GetCVar(string cvar);
 
 	// Action functions
 	// Meh, MBF redundant functions. Only for DeHackEd support.