diff --git a/src/Cube.mm b/src/Cube.mm
index 37a1635..6621caa 100644
--- a/src/Cube.mm
+++ b/src/Cube.mm
@@ -345,15 +345,6 @@ fatal(OFString *s, OFString *o) // failure exit
 	[OFApplication terminateWithStatus:1];
 }
 
-void *
-alloc(int s) // for some big chunks... most other allocs use the memory pool
-{
-	void *b = calloc(1, s);
-	if (!b)
-		fatal(@"out of memory!");
-	return b;
-}
-
 void
 quit() // normal exit
 {
diff --git a/src/clientgame.mm b/src/clientgame.mm
index d7ff44d..e9045ae 100644
--- a/src/clientgame.mm
+++ b/src/clientgame.mm
@@ -100,7 +100,7 @@ spawnstate(dynent *d) // reset player state not persistent accross spawns
 dynent *
 newdynent() // create a new blank player or monster
 {
-	dynent *d = (dynent *)malloc(sizeof(dynent));
+	dynent *d = (dynent *)OFAllocMemory(1, sizeof(dynent));
 	d->o.x = 0;
 	d->o.y = 0;
 	d->o.z = 0;
@@ -185,8 +185,7 @@ arenarespawn()
 void
 zapdynent(dynent *&d)
 {
-	if (d)
-		free(d);
+	OFFreeMemory(d);
 	d = NULL;
 }
 
@@ -281,9 +280,9 @@ updateworld(int millis) // main game update loop
 	lastmillis = millis;
 }
 
+// brute force but effective way to find a free spawn spot in the map
 void
-entinmap(dynent *
-        d) // brute force but effective way to find a free spawn spot in the map
+entinmap(dynent *d)
 {
 	loopi(100) // try max 100 times
 	{
diff --git a/src/editing.mm b/src/editing.mm
index 7d0e2fe..1099b72 100644
--- a/src/editing.mm
+++ b/src/editing.mm
@@ -247,7 +247,7 @@ pruneundos(int maxremain) // bound memory
 	{
 		t += undos[i]->xs * undos[i]->ys * sizeof(sqr);
 		if (t > maxremain)
-			free(undos.remove(i));
+			OFFreeMemory(undos.remove(i));
 	}
 }
 
@@ -268,7 +268,7 @@ editundo()
 	}
 	block *p = undos.pop();
 	blockpaste(*p);
-	free(p);
+	OFFreeMemory(p);
 }
 
 block *copybuf = NULL;
@@ -278,7 +278,7 @@ copy()
 {
 	EDITSELMP;
 	if (copybuf)
-		free(copybuf);
+		OFFreeMemory(copybuf);
 	copybuf = blockcopy(sel);
 }
 
diff --git a/src/protos.h b/src/protos.h
index 00f890f..441dae7 100644
--- a/src/protos.h
+++ b/src/protos.h
@@ -140,7 +140,6 @@ extern int isoccluded(float vx, float vy, float cx, float cy, float csize);
 
 // main
 extern void fatal(OFString *s, OFString *o = @"");
-extern void *alloc(int s);
 
 // rendertext
 extern void draw_text(OFString *string, int left, int top, int gl_num);
diff --git a/src/rendercubes.mm b/src/rendercubes.mm
index 60ed42d..b5127fb 100644
--- a/src/rendercubes.mm
+++ b/src/rendercubes.mm
@@ -18,10 +18,9 @@ setarraypointers()
 void
 reallocv()
 {
-	verts = (vertex *)realloc(verts, (curmaxverts *= 2) * sizeof(vertex));
+	verts =
+	    (vertex *)OFResizeMemory(verts, (curmaxverts *= 2), sizeof(vertex));
 	curmaxverts -= 10;
-	if (!verts)
-		fatal(@"no vertex memory!");
 	setarraypointers();
 }
 
diff --git a/src/rendergl.mm b/src/rendergl.mm
index 026ba5f..e582ee4 100644
--- a/src/rendergl.mm
+++ b/src/rendergl.mm
@@ -141,7 +141,7 @@ installtex(int tnum, OFIRI *IRI, int *xs, int *ys, bool clamp)
 		if (*xs != s->w) {
 			conoutf(@"warning: quality loss: scaling %@",
 			    IRI.string); // for voodoo cards under linux
-			scaledimg = alloc(*xs * *ys * 3);
+			scaledimg = OFAllocMemory(1, *xs * *ys * 3);
 			gluScaleImage(GL_RGB, s->w, s->h, GL_UNSIGNED_BYTE,
 			    s->pixels, *xs, *ys, GL_UNSIGNED_BYTE, scaledimg);
 		}
diff --git a/src/serverutil.mm b/src/serverutil.mm
index 2b454ad..38d34d4 100644
--- a/src/serverutil.mm
+++ b/src/serverutil.mm
@@ -108,8 +108,8 @@ sendmaps(int n, OFString *mapname, int mapsize, uchar *mapdata)
 	copyname = mapname;
 	copysize = mapsize;
 	if (copydata)
-		free(copydata);
-	copydata = (uchar *)alloc(mapsize);
+		OFFreeMemory(copydata);
+	copydata = (uchar *)OFAllocMemory(1, mapsize);
 	memcpy(copydata, mapdata, mapsize);
 }
 
diff --git a/src/tools.h b/src/tools.h
index 9ffd2cf..0cd74a5 100644
--- a/src/tools.h
+++ b/src/tools.h
@@ -25,6 +25,8 @@
 # include <new.h>
 #endif
 
+#import <ObjFW/ObjFW.h>
+
 #ifdef NULL
 # undef NULL
 #endif
@@ -127,7 +129,7 @@ template <class T> struct vector {
 	vector()
 	{
 		alen = 8;
-		buf = (T *)malloc(alen * sizeof(T));
+		buf = (T *)OFAllocMemory(alen, sizeof(T));
 		ulen = 0;
 	}
 
@@ -212,7 +214,7 @@ template <class T> struct vector {
 	void
 	realloc()
 	{
-		buf = (T *)::realloc(buf, (alen *= 2) * sizeof(T));
+		buf = (T *)OFResizeMemory(buf, (alen *= 2), sizeof(T));
 	}
 
 	T
diff --git a/src/world.mm b/src/world.mm
index 8d97b7a..8850535 100644
--- a/src/world.mm
+++ b/src/world.mm
@@ -423,7 +423,7 @@ setupworld(int factor)
 	ssize = 1 << (sfactor = factor);
 	cubicsize = ssize * ssize;
 	mipsize = cubicsize * 134 / 100;
-	sqr *w = world = (sqr *)alloc(mipsize * sizeof(sqr));
+	sqr *w = world = (sqr *)OFAllocZeroedMemory(mipsize, sizeof(sqr));
 	loopi(LARGEST_FACTOR * 2)
 	{
 		wmip[i] = w;
@@ -431,10 +431,10 @@ setupworld(int factor)
 	}
 }
 
+// main empty world creation routine, if passed factor -1 will enlarge old
+// world by 1
 void
-empty_world(
-    int factor, bool force) // main empty world creation routine, if passed
-                            // factor -1 will enlarge old world by 1
+empty_world(int factor, bool force)
 {
 	if (!force && noteditmode())
 		return;
@@ -495,7 +495,7 @@ empty_world(
 	calclight();
 	startmap(@"base/unnamed");
 	if (oldworld) {
-		free(oldworld);
+		OFFreeMemory(oldworld);
 		toggleedit();
 		execute(@"fullbright 1");
 	}
diff --git a/src/worldlight.mm b/src/worldlight.mm
index f6818b1..df447b1 100644
--- a/src/worldlight.mm
+++ b/src/worldlight.mm
@@ -238,7 +238,8 @@ dodynlight(
 block *
 blockcopy(block &s)
 {
-	block *b = (block *)alloc(sizeof(block) + s.xs * s.ys * sizeof(sqr));
+	block *b = (block *)OFAllocZeroedMemory(
+	    1, sizeof(block) + s.xs * s.ys * sizeof(sqr));
 	*b = s;
 	sqr *q = (sqr *)(b + 1);
 	for (int x = s.x; x < s.xs + s.x; x++)