diff --git a/pcode.c b/pcode.c
index 9d5fd41..c13bf36 100644
--- a/pcode.c
+++ b/pcode.c
@@ -476,6 +476,9 @@ static char *PCDNames[PCODE_COMMAND_COUNT] =
 	"PCD_CALLSTACK",			// from Eternity
 	"PCD_SCRIPTWAITNAMED",
 	"PCD_TRANSLATIONRANGE3",
+	"PCD_SQRT",
+	"PCD_FIXEDSQRT",
+	"PCD_VECTORLENGTH",
 };
 
 // CODE --------------------------------------------------------------------
diff --git a/pcode.h b/pcode.h
index fdad84e..fa09f64 100644
--- a/pcode.h
+++ b/pcode.h
@@ -425,6 +425,9 @@ typedef enum
 	PCD_CALLSTACK,			// from Eternity
 	PCD_SCRIPTWAITNAMED,
 	PCD_TRANSLATIONRANGE3,
+	PCD_SQRT,
+	PCD_FIXEDSQRT,
+	PCD_VECTORLENGTH,
 
 	PCODE_COMMAND_COUNT
 } pcd_t;
diff --git a/symbol.c b/symbol.c
index 3c6a6d0..1d92dde 100644
--- a/symbol.c
+++ b/symbol.c
@@ -143,6 +143,9 @@ static internFuncDef_t InternalFunctions[] =
 	{ "sin", PCD_NOP, PCD_SIN, 1, 0, 0, YES, NO },
 	{ "cos", PCD_NOP, PCD_COS, 1, 0, 0, YES, NO },
 	{ "vectorangle", PCD_NOP, PCD_VECTORANGLE, 2, 0, 0, YES, NO },
+	{ "vectorlength", PCD_NOP, PCD_VECTORLENGTH, 2, 0, 0, YES, NO },
+	{ "sqrt", PCD_NOP, PCD_SQRT, 1, 0, 0, YES, NO },
+	{ "fixedsqrt", PCD_NOP, PCD_SQRT, 1, 0, 0, YES, NO },
 	{ "checkweapon", PCD_NOP, PCD_CHECKWEAPON, 1, 0, 0, YES, NO },
 	{ "setweapon", PCD_NOP, PCD_SETWEAPON, 1, 0, 0, YES, NO },
 	{ "setmarineweapon", PCD_NOP, PCD_SETMARINEWEAPON, 2, 0, 0, NO, NO },