diff --git a/polymer/eduke32/build/src/tiles.c b/polymer/eduke32/build/src/tiles.c
index fa8f27753..89559fc6c 100644
--- a/polymer/eduke32/build/src/tiles.c
+++ b/polymer/eduke32/build/src/tiles.c
@@ -504,7 +504,7 @@ int32_t loadpics(const char *filename, int32_t askedsize)
     Bmemset(gotpic, 0, sizeof(gotpic));
 
     //cachesize = min((int32_t)((Bgetsysmemsize()/100)*60),max(artsize,askedsize));
-    cachesize = (Bgetsysmemsize() <= (uint32_t)askedsize) ? (Bgetsysmemsize() / 100) * 60 : askedsize;
+    cachesize = (Bgetsysmemsize() <= (uint32_t)askedsize) ? (int32_t)((Bgetsysmemsize() / 100) * 60) : askedsize;
 
     // NOTE: this doesn't make a lot of sense on modern OSs...
     while ((pic = Bmalloc(cachesize)) == NULL)