diff --git a/src/system/kernel/debug/user_debugger.cpp b/src/system/kernel/debug/user_debugger.cpp
index 7be3fa6092..4b2102cb88 100644
--- a/src/system/kernel/debug/user_debugger.cpp
+++ b/src/system/kernel/debug/user_debugger.cpp
@@ -75,7 +75,7 @@ debugger_write(port_id port, int32 code, const void *buffer, size_t bufferSize,
 	// get the write lock
 	TRACE(("debugger_write(): acquiring write lock...\n"));
 	error = acquire_sem_etc(writeLock, 1,
-		(dontWait ? B_RELATIVE_TIMEOUT : B_KILL_CAN_INTERRUPT), 0);
+		dontWait ? (uint32)B_RELATIVE_TIMEOUT : (uint32)B_KILL_CAN_INTERRUPT, 0);
 	if (error != B_OK) {
 		TRACE(("debugger_write() done1: %lx\n", error));
 		return error;
@@ -96,7 +96,7 @@ debugger_write(port_id port, int32 code, const void *buffer, size_t bufferSize,
 		TRACE(("debugger_write(): writing to port...\n"));
 
 		error = write_port_etc(port, code, buffer, bufferSize,
-			(dontWait ? B_RELATIVE_TIMEOUT : B_KILL_CAN_INTERRUPT), 0);
+			dontWait ? (uint32)B_RELATIVE_TIMEOUT : (uint32)B_KILL_CAN_INTERRUPT, 0);
 	}
 
 	// release the write lock
diff --git a/src/system/kernel/elf.c b/src/system/kernel/elf.c
index 1e43a44ca1..a79f39d712 100644
--- a/src/system/kernel/elf.c
+++ b/src/system/kernel/elf.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2005, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
+ * Copyright 2002-2006, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
  * Distributed under the terms of the MIT License.
  *
  * Copyright 2001, Travis Geiselbrecht. All rights reserved.
@@ -212,14 +212,14 @@ create_image_struct()
 
 
 static uint32
-elf_hash(const unsigned char *name)
+elf_hash(const char *name)
 {
-	unsigned long hash = 0;
-	unsigned long temp;
+	uint32 hash = 0;
+	uint32 temp;
 
 	while (*name) {
-		hash = (hash << 4) + *name++;
-		if((temp = hash & 0xf0000000))
+		hash = (hash << 4) + (uint8)*name++;
+		if ((temp = hash & 0xf0000000) != 0)
 			hash ^= temp >> 24;
 		hash &= ~temp;
 	}
diff --git a/src/system/kernel/lib/kernel_vsprintf.c b/src/system/kernel/lib/kernel_vsprintf.c
index a0d803b40e..732bbc6d99 100644
--- a/src/system/kernel/lib/kernel_vsprintf.c
+++ b/src/system/kernel/lib/kernel_vsprintf.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2003-2005, Axel Dörfler. All rights reserved.
+ * Copyright 2003-2006, Axel Dörfler. All rights reserved.
  * Distributed under the terms of the MIT license.
  * 
  * Copyright 2001, Travis Geiselbrecht. All rights reserved.
@@ -169,7 +169,7 @@ number(char **_string, int32 *_bytesLeft, int64 num, uint32 base, int size,
 	if (num == 0)
 		tmp[i++] = '0';
 	else while (num != 0)
-		tmp[i++] = digits[do_div(&num, base)];
+		tmp[i++] = digits[do_div((uint64 *)&num, base)];
 
 	if (i > precision)
 		precision = i;
diff --git a/src/system/kernel/module.c b/src/system/kernel/module.c
index 1bf02052e9..53ee717ac7 100644
--- a/src/system/kernel/module.c
+++ b/src/system/kernel/module.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2005, Haiku Inc. All rights reserved.
+ * Copyright 2002-2006, Haiku Inc. All rights reserved.
  * Distributed under the terms of the MIT License.
  *
  * Copyright 2001, Thomas Kurschel. All rights reserved.
@@ -127,7 +127,7 @@ typedef struct module_iterator {
 	module_image		*module_image;
 	module_info			**current_header;
 	const char			*current_path;
-	int32				path_base_length;
+	uint32				path_base_length;
 	const char			*current_module_path;
 	bool				builtin_modules;
 } module_iterator;