diff --git a/common/main/morph.h b/common/main/morph.h
index 1585b2f36..38b466bb0 100644
--- a/common/main/morph.h
+++ b/common/main/morph.h
@@ -34,8 +34,6 @@ COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
 #include "dsx-ns.h"
 #include "compiler-array.h"
 
-#define MAX_VECS 5000
-
 #ifdef dsx
 #include "object.h"
 
@@ -43,6 +41,10 @@ namespace dsx {
 
 struct morph_data : prohibit_void_ptr<morph_data>
 {
+	enum
+	{
+		MAX_VECS = 5000,
+	};
 	object *obj;                                // object which is morphing
 	int n_submodels_active;
 	uint8_t morph_save_control_type;
diff --git a/similar/main/morph.cpp b/similar/main/morph.cpp
index c1e45005b..ea840edc8 100644
--- a/similar/main/morph.cpp
+++ b/similar/main/morph.cpp
@@ -145,7 +145,7 @@ static void init_points(polymodel *pm,const vms_vector *box_size,int submodel_nu
 	else
 		i = 0;				//start at zero
 
-	Assert(i+nverts < MAX_VECS);
+	assert(i + nverts < morph_data::MAX_VECS);
 
 	md->submodel_startpoints[submodel_num] = i;