diff --git a/src/config.h b/src/config.h
index 2f7a890..8410f3a 100644
--- a/src/config.h
+++ b/src/config.h
@@ -22,6 +22,9 @@
 /* The size of the player */
 #define P_WIDTH 16
 #define P_HEIGHT 16
+/*Max number of dynamic NPCs.*/
+#define NPC_STACK_SIZE 256
+
 #else
 /* The tile size */
 #define T_HEIGHT 8
@@ -32,6 +35,9 @@
 /* The player size */
 #define P_WIDTH 8
 #define P_HEIGHT 8
+/*Max number of "dynamic" NPCs. We are starved for static ram on fx !*/
+#define NPC_STACK_SIZE 32
+
 #endif
 
 /* SPEED should NOT be 8 or bigger: it may cause bugs when handling
diff --git a/src/npc.c b/src/npc.c
index f308b3e..b9cf88e 100644
--- a/src/npc.c
+++ b/src/npc.c
@@ -16,13 +16,11 @@ extern bopti_image_t tiny_npc_female;
 extern bopti_image_t tiny_npc_milkman;
 extern bopti_image_t tiny_npc_police;
 
-#define NPC_STACK_SIZE 256
-
 NPC npc_stack[NPC_STACK_SIZE];
 uint32_t npc_count;
 
 NPC *npc_create() {
-    if(npc_count == 256)
+    if(npc_count == NPC_STACK_SIZE)
         return NULL;
 
     return &npc_stack[npc_count++];