diff --git a/ocat b/ocat
index 11a4c91f..37ed9738 100755
Binary files a/ocat and b/ocat differ
diff --git a/showdef b/showdef
index f5fd9a84..f07ace95 100755
Binary files a/showdef and b/showdef differ
diff --git a/src/lib/system/linux/gnuc/x86_64/SYSTEM.c0 b/src/lib/system/linux/gnuc/x86_64/SYSTEM.c0
index bb8ee442..3d875068 100644
--- a/src/lib/system/linux/gnuc/x86_64/SYSTEM.c0
+++ b/src/lib/system/linux/gnuc/x86_64/SYSTEM.c0
@@ -20,7 +20,7 @@
 #include "varargs.h"
 #endif
 
-extern void *malloc(long size);
+extern void *malloc(unsigned long size);
 extern void exit(int status);
 
 void (*SYSTEM_Halt)();
diff --git a/src/lib/system/linux/gnuc/x86_64/SYSTEM.h b/src/lib/system/linux/gnuc/x86_64/SYSTEM.h
index e9a246b7..c0cd257a 100644
--- a/src/lib/system/linux/gnuc/x86_64/SYSTEM.h
+++ b/src/lib/system/linux/gnuc/x86_64/SYSTEM.h
@@ -13,8 +13,8 @@ uses double # as concatenation operator
 
 #include <alloca.h>
 
-extern void *memcpy(void *dest, const void *src, long n);
-extern void *malloc(long size);
+extern void *memcpy(void *dest, const void *src, unsigned long n);
+extern void *malloc(unsigned long size);
 extern void exit(int status);
 
 #define export
diff --git a/voc b/voc
index fed33f8a..5868f635 100755
Binary files a/voc and b/voc differ
diff --git a/vocstatic.linux.gnuc.x86_64 b/vocstatic.linux.gnuc.x86_64
index e540fb32..5868f635 100755
Binary files a/vocstatic.linux.gnuc.x86_64 and b/vocstatic.linux.gnuc.x86_64 differ