diff --git a/core/smn_halflife.cpp b/core/smn_halflife.cpp
index 183ef8da..b0c7c6b5 100644
--- a/core/smn_halflife.cpp
+++ b/core/smn_halflife.cpp
@@ -467,7 +467,7 @@ static cell_t GuessSDKVersion(IPluginContext *pContext, const cell_t *params)
 	case SOURCE_ENGINE_BLOODYGOODTIME:
 		return 32;
 	case SOURCE_ENGINE_EYE:
-		return 34;
+		return 33;
 	case SOURCE_ENGINE_ORANGEBOXVALVE:
 		return 35;
 	case SOURCE_ENGINE_LEFT4DEAD:
diff --git a/plugins/include/halflife.inc b/plugins/include/halflife.inc
index 35428bd3..f15d8588 100644
--- a/plugins/include/halflife.inc
+++ b/plugins/include/halflife.inc
@@ -41,6 +41,7 @@
 #define SOURCE_SDK_EPISODE1			20		/**< SDK+Engine released after Episode 1 */
 #define SOURCE_SDK_EPISODE2			30		/**< SDK+Engine released after Episode 2/Orange Box */
 #define SOURCE_SDK_BLOODYGOODTIME	32		/**< Modified version of ep2 engine used by Bloody Good Time (no SDK) */
+#define SOURCE_SDK_EYE				33		/**< Modified version of ep2 engine used by E.Y.E Divine Cybermancy (no SDK) */
 #define SOURCE_SDK_EPISODE2VALVE	35		/**< SDK+Engine released after Episode 2/Orange Box */
 #define SOURCE_SDK_LEFT4DEAD		40		/**< Engine released after Left 4 Dead (no SDK yet) */
 #define SOURCE_SDK_LEFT4DEAD2		50		/**< Engine released after Left 4 Dead 2 (no SDK yet) */