diff --git a/reactos/apps/tests/args/args.c b/reactos/apps/tests/args/args.c
index 148f486a7e4..9e3aca04e8d 100644
--- a/reactos/apps/tests/args/args.c
+++ b/reactos/apps/tests/args/args.c
@@ -1,6 +1,7 @@
 #include <ddk/ntddk.h>
 #include <stdarg.h>
 #include <string.h>
+#include <stdio.h>
 
 HANDLE OutputHandle;
 HANDLE InputHandle;
diff --git a/reactos/apps/utils/shell/shell.c b/reactos/apps/utils/shell/shell.c
index b833fb40e29..7a74ef06546 100644
--- a/reactos/apps/utils/shell/shell.c
+++ b/reactos/apps/utils/shell/shell.c
@@ -240,7 +240,7 @@ void ReadLine(char* line)
    *line = 0;
 }
 
-void main()
+void main(void)
 {
    static char line[255];
 
diff --git a/reactos/drivers/dd/serial/serial.c b/reactos/drivers/dd/serial/serial.c
index 6b52d1ccffa..38b7ebcffae 100644
--- a/reactos/drivers/dd/serial/serial.c
+++ b/reactos/drivers/dd/serial/serial.c
@@ -103,22 +103,22 @@ void InitializeSerial(void)
         {
                 if(uart_detect(comports[i])==0)
                 {
-                          printk("%s not detected\n", comname[i]);
+                          DbgPrint("%s not detected\n", comname[i]);
                 } else {
                           uart_init(comports[i]);
                           irq_level=irq_setup(comports[i]);
                           if(irq_level==-1)
                           {
-                                    printk("Warning: IRQ not detected!\n");
+                                    DbgPrint("Warning: IRQ not detected!\n");
                           } else {
-                                    printk("%s hooked to interrupt level %d\n", comname[i], irq_level);
+                                    DbgPrint("%s hooked to interrupt level %d\n", comname[i], irq_level);
                           };
                 };
         };
 };
 
 // For testing purposes
-void testserial()
+void testserial(void)
 {
         int i=0;
         char testc;
@@ -128,7 +128,7 @@ void testserial()
           char character;
         } x;
 
-        printk("Testing serial input...\n");
+        DbgPrint("Testing serial input...\n");
 
         while(i==0) {
           x.val=uart_getchar(COM1);
@@ -137,13 +137,13 @@ void testserial()
 
                 testc=inb_p(COM1);
 
-//    printk("(%x-%c)  %c\n", x.val, x.character, testc);
+//    DbgPrint("(%x-%c)  %c\n", x.val, x.character, testc);
         };
 };
 
 NTSTATUS DriverEntry(PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath)
 {
-        printk("Serial Driver 0.0.2\n");
+        DbgPrint("Serial Driver 0.0.2\n");
         InitializeSerial();
 //        testserial();
         return(STATUS_SUCCESS);
diff --git a/reactos/drivers/fs/minix/dir.c b/reactos/drivers/fs/minix/dir.c
index 720e02d7960..2b5c9e79346 100644
--- a/reactos/drivers/fs/minix/dir.c
+++ b/reactos/drivers/fs/minix/dir.c
@@ -10,6 +10,7 @@
 /* INCLUDES *****************************************************************/
 
 #include <ddk/ntddk.h>
+#include <string.h>
 
 #define NDEBUG
 #include <internal/debug.h>
diff --git a/reactos/lib/crtdll/misc/dllmain.c b/reactos/lib/crtdll/misc/dllmain.c
index a2f3fcbda7f..afadcf51e28 100644
--- a/reactos/lib/crtdll/misc/dllmain.c
+++ b/reactos/lib/crtdll/misc/dllmain.c
@@ -17,14 +17,15 @@
  *  DISCLAMED. This includes but is not limited to warrenties of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  *
- * $Revision: 1.3 $
- * $Author: ariadne $
- * $Date: 1999/04/23 18:42:21 $
+ * $Revision: 1.4 $
+ * $Author: ekohl $
+ * $Date: 1999/04/29 23:34:23 $
  *
  */
 
 #include <windows.h>
 #include <stdarg.h>
+#include <stdio.h>
 #include <string.h>
 
 void debug_printf(char* fmt, ...)
diff --git a/reactos/lib/kernel32/internal/dprintf.c b/reactos/lib/kernel32/internal/dprintf.c
index d248bf909ec..9e3aac00840 100644
--- a/reactos/lib/kernel32/internal/dprintf.c
+++ b/reactos/lib/kernel32/internal/dprintf.c
@@ -1,6 +1,7 @@
 #include <windows.h>
 #include <ddk/ntddk.h>
 #include <stdarg.h>
+#include <stdio.h>
 
 VOID STDCALL OutputDebugStringA(LPCSTR lpOutputString)
 {