diff --git a/include/net/opt.h b/include/net/opt.h
index 3156c2c..4dbf656 100644
--- a/include/net/opt.h
+++ b/include/net/opt.h
@@ -38,6 +38,8 @@
 #if !defined LWIP_HDR_OPT_H
 #define LWIP_HDR_OPT_H
 
+#include <stddef.h>
+
 /*
  * Include user defined options first. Anything not defined in these files
  * will be set to standard values. Override anything you don't like!
diff --git a/include/sys/_types.h b/include/sys/_types.h
index b8aeb97..baef253 100644
--- a/include/sys/_types.h
+++ b/include/sys/_types.h
@@ -70,6 +70,13 @@
 typedef __ct_rune_t     __rune_t;       /* rune_t (see above) */
 typedef __ct_rune_t     __wint_t;       /* wint_t (see above) */
 
+typedef struct {
+        long long __max_align1 __aligned(_Alignof(long long));
+#ifndef _STANDALONE
+        long double __max_align2 __aligned(_Alignof(long double));
+#endif
+} __max_align_t;
+
 
 #if !defined(__clang__) || !defined(__cplusplus)
 typedef __uint_least16_t   __char16_t;
diff --git a/sys/net/api/Makefile b/sys/net/api/Makefile
index 20ec808..8ce3ea4 100644
--- a/sys/net/api/Makefile
+++ b/sys/net/api/Makefile
@@ -13,13 +13,13 @@
 
 #  Compile Types
 .cc.o:
-	$(CXX) ${CFLAGS} -DNOBOOL -I../../include -c -o $@ $<
+	$(CXX) ${CFLAGS} -DNOBOOL -I../../../include -c -o $@ $<
 .cc.s:
-	$(CXX) ${CFLAGS} -DNOBOOL -I../../include -S -o $@ $<
+	$(CXX) ${CFLAGS} -DNOBOOL -I../../../include -S -o $@ $<
 .c.o:
-	$(CC) ${CFLAGS} -I../../include -c -o $@ $<
+	$(CC) ${CFLAGS} -I../../../include -c -o $@ $<
 .c.s:
-	$(CC) ${CFLAGS}-I../../include -S -o $@ $<
+	$(CC) ${CFLAGS}-I../../../include -S -o $@ $<
 .S.o:
 	$(CC) ${CFLAGS}-c -o $@ $<
 
diff --git a/sys/net/core/init.c b/sys/net/core/init.c
index 20c7be8..a2271c7 100644
--- a/sys/net/core/init.c
+++ b/sys/net/core/init.c
@@ -31,6 +31,7 @@
 
 #include "net/opt.h"
 
+#include <stddef.h>
 #include <ubixos/sem.h>
 
 #include "net/init.h"
diff --git a/sys/net/core/ipv4/Makefile b/sys/net/core/ipv4/Makefile
index 008e01a..bcbea86 100644
--- a/sys/net/core/ipv4/Makefile
+++ b/sys/net/core/ipv4/Makefile
@@ -12,13 +12,13 @@
 
 #  Compile Types
 .cc.o:
-	$(CXX) ${CFLAGS} -DNOBOOL -I../../../include -c -o $@ $<
+	$(CXX) ${CFLAGS} -DNOBOOL -I../../../../include -c -o $@ $<
 .cc.s:
-	$(CXX) ${CFLAGS} -DNOBOOL -I../../../include -S -o $@ $<
+	$(CXX) ${CFLAGS} -DNOBOOL -I../../../../include -S -o $@ $<
 .c.o:
-	$(CC) ${CFLAGS} -I../../../include -c -o $@ $<
+	$(CC) ${CFLAGS} -I../../../../include -c -o $@ $<
 .c.s:
-	$(CC) ${CFLAGS} -I../../../include -S -o $@ $<
+	$(CC) ${CFLAGS} -I../../../../include -S -o $@ $<
 .S.o:
 	$(CC) ${CFLAGS} -c -o $@ $<
 
diff --git a/sys/net/core/ipv6/Makefile b/sys/net/core/ipv6/Makefile
index 71d058c..f0ca889 100644
--- a/sys/net/core/ipv6/Makefile
+++ b/sys/net/core/ipv6/Makefile
@@ -12,13 +12,13 @@
 
 #  Compile Types
 .cc.o:
-	$(CXX) ${CFLAGS} -DNOBOOL -I../../../include -c -o $@ $<
+	$(CXX) ${CFLAGS} -DNOBOOL -I../../../../include -c -o $@ $<
 .cc.s:
-	$(CXX) ${CFLAGS} -DNOBOOL -I../../../include -S -o $@ $<
+	$(CXX) ${CFLAGS} -DNOBOOL -I../../../../include -S -o $@ $<
 .c.o:
-	$(CC) ${CFLAGS} -I../../../include -c -o $@ $<
+	$(CC) ${CFLAGS} -I../../../../include -c -o $@ $<
 .c.s:
-	$(CC) ${CFLAGS} -I../../../include -S -o $@ $<
+	$(CC) ${CFLAGS} -I../../../../include -S -o $@ $<
 .S.o:
 	$(CC) ${CFLAGS} -c -o $@ $<
 
diff --git a/sys/net/net/Makefile b/sys/net/net/Makefile
index a3489aa..f858454 100644
--- a/sys/net/net/Makefile
+++ b/sys/net/net/Makefile
@@ -13,13 +13,13 @@
 
 #  Compile Types
 .cc.o:
-	$(CXX) ${CFLAGS} -DNOBOOL -I../../include -c -o $@ $<
+	$(CXX) ${CFLAGS} -DNOBOOL -I../../../include -c -o $@ $<
 .cc.s:
-	$(CXX) ${CFLAGS} -DNOBOOL-I../../include -S -o $@ $<
+	$(CXX) ${CFLAGS} -DNOBOOL-I../../../include -S -o $@ $<
 .c.o:
-	$(CC) ${CFLAGS} -I../../include -c -o $@ $<
+	$(CC) ${CFLAGS} -I../../../include -c -o $@ $<
 .c.s:
-	$(CC) ${CFLAGS} -I../../include -S -o $@ $<
+	$(CC) ${CFLAGS} -I../../../include -S -o $@ $<
 .S.o:
 	$(CC) ${CFLAGS} -c -o $@ $<
 
diff --git a/sys/net/netif/Makefile b/sys/net/netif/Makefile
index d90ab2f..e9a5b4e 100644
--- a/sys/net/netif/Makefile
+++ b/sys/net/netif/Makefile
@@ -13,13 +13,13 @@
 
 #  Compile Types
 .cc.o:
-	$(CXX) ${CFLAGS} -DNOBOOL -I../../include -c -o $@ $<
+	$(CXX) ${CFLAGS} -DNOBOOL -I../../../include -c -o $@ $<
 .cc.s:
-	$(CXX) ${CFLAGS} -DNOBOOL -I../../include -S -o $@ $<
+	$(CXX) ${CFLAGS} -DNOBOOL -I../../../include -S -o $@ $<
 .c.o:
-	$(CC) ${CFLAGS} -I../../include -c -o $@ $<
+	$(CC) ${CFLAGS} -I../../../include -c -o $@ $<
 .c.s:
-	$(CC) ${CFLAGS} -I../../include -S -o $@ $<
+	$(CC) ${CFLAGS} -I../../../include -S -o $@ $<
 .S.o:
 	$(CC) ${CFLAGS} -c -o $@ $<