diff -ur a/src/malloc.c b/src/malloc.c
--- a/src/malloc.c
+++ b/src/malloc.c
@@ -12,7 +12,6 @@
 #include "signals.h"
 #include "malloc.h"
 
-caddr_t mmalloc_base = NULL;
 int low_memory_warning = 0;
 static char *reserve = NULL;
 
diff -ur a/src/malloc.h b/src/malloc.h
--- a/src/malloc.h
+++ b/src/malloc.h
@@ -34,6 +34,8 @@
 # define realloc(ptr, size)		mrealloc(NULL, ptr, size)
 # define free(ptr)			mfree(NULL, ptr)
 #else
+# include <stdlib.h>
+# include <sys/types.h>
 # define mmalloc(md, size)		malloc(size)
 # define mcalloc(md, size)		calloc(size)
 # define mrealloc(md, ptr, size)	realloc(ptr, size)
diff -ur a/src/socket.c b/src/socket.c
--- a/src/socket.c
+++ b/src/socket.c
@@ -2600,7 +2600,7 @@
 	    socks_with_lines--;
 
 	if (line->attrs & (F_TFPROMPT)) {
-	    incoming_text = line;
+	    incoming_text = (String*)line;
 	    handle_prompt(incoming_text, 0, TRUE);
 	    continue;
 	}
diff -ur a/src/tfio.c b/src/tfio.c
--- a/src/tfio.c
+++ b/src/tfio.c
@@ -70,6 +70,7 @@
 static void filenputs(const char *str, int n, FILE *fp);
 static void queueputline(conString *line, TFILE *file);
 
+extern void main_loop(void);
 
 void init_tfio(void)
 {