diff --git a/parse.c b/parse.c
index ed5267e..6e89858 100644
--- a/parse.c
+++ b/parse.c
@@ -2045,6 +2045,9 @@ static void BuildPrintString(void)
 			case 'f': // [RH] fixed point
 				printCmd = PCD_PRINTFIXED;
 				break;
+			case 'k': // [GRB] key binding
+				printCmd = PCD_PRINTBIND;
+				break;
 			default:
 				printCmd = PCD_PRINTSTRING;
 				ERR_Error(ERR_UNKNOWN_PRTYPE, YES);
diff --git a/pcode.c b/pcode.c
index 8132e47..ca55932 100644
--- a/pcode.c
+++ b/pcode.c
@@ -443,6 +443,7 @@ static char *PCDNames[PCODE_COMMAND_COUNT] =
 	"PCD_NEGATEBINARY",
 	"PCD_GETACTORPITCH",
 	"PCD_SETACTORPITCH",
+	"PCD_PRINTBIND",
 };
 
 // CODE --------------------------------------------------------------------
diff --git a/pcode.h b/pcode.h
index b84dfbd..b2d571a 100644
--- a/pcode.h
+++ b/pcode.h
@@ -393,6 +393,7 @@ typedef enum
 	PCD_NEGATEBINARY,
 	PCD_GETACTORPITCH,
 	PCD_SETACTORPITCH,
+	PCD_PRINTBIND,
 
 	PCODE_COMMAND_COUNT
 } pcd_t;
diff --git a/zdefs.acs b/zdefs.acs
index 0f751da..8f2a6ee 100644
--- a/zdefs.acs
+++ b/zdefs.acs
@@ -172,6 +172,8 @@
 #define APROP_JumpZ			12
 #define APROP_ChaseGoal		13
 #define APROP_Frightened	14
+#define APROP_Gravity		15
+#define APROP_Friendly		16
 #define APROP_SeeSound		5	// Sounds can only be set, not gotten
 #define APROP_AttackSound	6
 #define APROP_PainSound		7