diff --git a/src/core/init.c b/src/core/init.c
index 8c2d9efd..9d1e97e6 100644
--- a/src/core/init.c
+++ b/src/core/init.c
@@ -139,7 +139,7 @@
 #if ((NO_SYS==0) && (MEMP_NUM_SYS_TIMEOUT < (LWIP_TCP + IP_REASSEMBLY + LWIP_ARP + (2*LWIP_DHCP) + LWIP_AUTOIP + LWIP_IGMP + LWIP_PPP)))
   #error "MEMP_NUM_SYS_TIMEOUT is too low to accomodate all required timeouts"
 #endif
-#if (MEMP_NUM_REASSDATA > IP_REASS_MAX_PBUFS)
+#if (IP_REASSEMBLY && (MEMP_NUM_REASSDATA > IP_REASS_MAX_PBUFS))
   #error "MEMP_NUM_REASSDATA > IP_REASS_MAX_PBUFS doesn't make sense since each struct ip_reassdata must hold 2 pbufs at least!"
 #endif