diff --git a/bcc/dbprintf.c b/bcc/dbprintf.c
index a77a012..d515a6a 100644
--- a/bcc/dbprintf.c
+++ b/bcc/dbprintf.c
@@ -1,6 +1,7 @@
-
 #include <sys/types.h>
 #include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
 
 #if defined(__STDC__) && !defined(__FIRST_ARG_IN_AX__)
 #include <stdarg.h>
@@ -10,6 +11,8 @@
 #define va_strt(p,i) va_start(p)
 #endif
 
+int vdbprintf(const char *fmt, va_list ap);
+
 #if defined(__STDC__) && !defined(__FIRST_ARG_IN_AX__)
 int dbprintf(const char * fmt, ...)
 #else
diff --git a/cpp/cpp.c b/cpp/cpp.c
index a6e7337..1ca4422 100644
--- a/cpp/cpp.c
+++ b/cpp/cpp.c
@@ -545,7 +545,7 @@ chget()
 }
 
 static void 
-unchget(ch)
+unchget(int ch)
 {
 #if CPP_DEBUG
    fprintf(stderr, "\b", ch);