diff --git a/kernel/arch/i686/PageTable.cpp b/kernel/arch/i686/PageTable.cpp
index d603548f..9073df2a 100644
--- a/kernel/arch/i686/PageTable.cpp
+++ b/kernel/arch/i686/PageTable.cpp
@@ -206,6 +206,7 @@ namespace Kernel
 	{
 		ASSERT(s_kernel);
 		ASSERT(paddr);
+		ASSERT(paddr % PAGE_SIZE == 0);
 
 		ASSERT(s_fast_page_lock.current_processor_has_lock());
 
diff --git a/kernel/arch/x86_64/PageTable.cpp b/kernel/arch/x86_64/PageTable.cpp
index 7f7b34bd..d844a3ab 100644
--- a/kernel/arch/x86_64/PageTable.cpp
+++ b/kernel/arch/x86_64/PageTable.cpp
@@ -503,6 +503,7 @@ namespace Kernel
 	{
 		ASSERT(s_kernel);
 		ASSERT(paddr);
+		ASSERT(paddr % PAGE_SIZE == 0);
 
 		ASSERT(s_fast_page_lock.current_processor_has_lock());