diff --git a/src/p_acs.cpp b/src/p_acs.cpp
index daffe0eae..8f604e782 100644
--- a/src/p_acs.cpp
+++ b/src/p_acs.cpp
@@ -6560,6 +6560,14 @@ scriptwait:
 			translation = NULL;
 			break;
 
+		case PCD_SQRT:
+			STACK(1) = xs_FloorToInt(sqrt(double(STACK(1))));
+			break;
+
+		case PCD_FIXEDSQRT:
+			STACK(1) = FLOAT2FIXED(sqrt(FIXED2DBL(STACK(1))));
+			break;
+
 		case PCD_SIN:
 			STACK(1) = finesine[angle_t(STACK(1)<<16)>>ANGLETOFINESHIFT];
 			break;
@@ -6573,6 +6581,11 @@ scriptwait:
 			sp--;
 			break;
 
+		case PCD_VECTORLENGTH:
+			STACK(2) = FLOAT2FIXED(TVector2<double>(FIXED2DBL(STACK(2)), FIXED2DBL(STACK(1))).Length());
+			sp--;
+			break;
+
         case PCD_CHECKWEAPON:
             if (activator == NULL || activator->player == NULL || // Non-players do not have weapons
                 activator->player->ReadyWeapon == NULL)
diff --git a/src/p_acs.h b/src/p_acs.h
index c2e0e9155..04384dd73 100644
--- a/src/p_acs.h
+++ b/src/p_acs.h
@@ -602,6 +602,9 @@ public:
 /*360*/	PCD_CALLSTACK,			// from Eternity
 		PCD_SCRIPTWAITNAMED,
 		PCD_TRANSLATIONRANGE3,
+		PCD_SQRT,
+		PCD_FIXEDSQRT,
+		PCD_VECTORLENGTH,
 
 /*361*/	PCODE_COMMAND_COUNT
 	};