diff --git a/src/DMAPI/tgs.dm b/src/DMAPI/tgs.dm
index ec0dad2040..800a0c27b2 100644
--- a/src/DMAPI/tgs.dm
+++ b/src/DMAPI/tgs.dm
@@ -1,5 +1,7 @@
 //tgstation-server DMAPI
 
+#define TGS_DMAPI_VERSION "5.0.0"
+
 //All functions and datums outside this document are subject to change with any version and should not be relied on
 
 //CONFIGURATION
@@ -108,12 +110,12 @@
 
 //represents a version of tgstation-server
 /datum/tgs_version
-	var/suite			//The suite version, can be >=3
+	var/suite			//The suite/major version, can be >=3
 
 	//this group of variables can be null to represent a wild card
-	var/major					//The major version
 	var/minor					//The minor version
 	var/patch					//The patch version
+	var/deprecated_patch		//The legacy version
 
 	var/raw_parameter			//The unparsed parameter
 	var/deprefixed_parameter	//The version only bit of raw_parameter
diff --git a/src/DMAPI/tgs/core/tgs_version.dm b/src/DMAPI/tgs/core/tgs_version.dm
index b97745611f..ffcc0bbc71 100644
--- a/src/DMAPI/tgs/core/tgs_version.dm
+++ b/src/DMAPI/tgs/core/tgs_version.dm
@@ -5,11 +5,11 @@
 
 	suite = text2num(version_bits[1])
 	if(version_bits.len > 1)
-		major = text2num(version_bits[2])
+		minor = text2num(version_bits[2])
 		if(version_bits.len > 2)
-			minor = text2num(version_bits[3])
+			patch = text2num(version_bits[3])
 			if(version_bits.len == 4)
-				patch = text2num(version_bits[4])
+				deprecated_patch = text2num(version_bits[4])
 
 /datum/tgs_version/proc/Valid(allow_wildcards = FALSE)
 	if(suite == null)
@@ -19,4 +19,4 @@
 	return !Wildcard()
 
 /datum/tgs_version/Wildcard()
-	return major == null || minor == null || patch == null
+	return minor == null || patch == null || deprecated_patch == null
diff --git a/src/Tgstation.Server.Host/Components/Watchdog/SessionController.cs b/src/Tgstation.Server.Host/Components/Watchdog/SessionController.cs
index 2199888fb6..4b1298c500 100644
--- a/src/Tgstation.Server.Host/Components/Watchdog/SessionController.cs
+++ b/src/Tgstation.Server.Host/Components/Watchdog/SessionController.cs
@@ -20,6 +20,11 @@ namespace Tgstation.Server.Host.Components.Watchdog
 	/// <inheritdoc />
 	sealed class SessionController : ISessionController, ICommHandler
 	{
+		/// <summary>
+		/// The DMAPI version being used.
+		/// </summary>
+		public static readonly Version DMApiVersion = new Version(5, 0, 0);
+
 		/// <inheritdoc />
 		public bool IsPrimary
 		{