diff --git a/plugins/include/halflife.inc b/plugins/include/halflife.inc
index bf00e7dc..35428bd3 100644
--- a/plugins/include/halflife.inc
+++ b/plugins/include/halflife.inc
@@ -40,6 +40,7 @@
 #define SOURCE_SDK_DARKMESSIAH		15		/**< Modified version of original engine used by Dark Messiah (no SDK) */
 #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_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) */