diff --git a/src/core/mem_func.hpp b/src/core/mem_func.hpp
index 04248e9476..d0eb6154f4 100644
--- a/src/core/mem_func.hpp
+++ b/src/core/mem_func.hpp
@@ -16,7 +16,7 @@
  * @param num number of items to be copied. (!not number of bytes!)
  */
 template <typename T>
-static FORCEINLINE void MemCpyT(T *destination, const T *source, uint num = 1)
+static FORCEINLINE void MemCpyT(T *destination, const T *source, size_t num = 1)
 {
 	memcpy(destination, source, num * sizeof(T));
 }
@@ -29,7 +29,7 @@ static FORCEINLINE void MemCpyT(T *destination, const T *source, uint num = 1)
  * @param num number of items to be copied. (!not number of bytes!)
  */
 template <typename T>
-static FORCEINLINE void MemMoveT(T *destination, const T *source, uint num = 1)
+static FORCEINLINE void MemMoveT(T *destination, const T *source, size_t num = 1)
 {
 	memmove(destination, source, num * sizeof(T));
 }
@@ -42,7 +42,7 @@ static FORCEINLINE void MemMoveT(T *destination, const T *source, uint num = 1)
  * @param num number of items to be set (!not number of bytes!)
  */
 template <typename T>
-static FORCEINLINE void MemSetT(T *ptr, byte value, uint num = 1)
+static FORCEINLINE void MemSetT(T *ptr, byte value, size_t num = 1)
 {
 	memset(ptr, value, num * sizeof(T));
 }
@@ -56,7 +56,7 @@ static FORCEINLINE void MemSetT(T *ptr, byte value, uint num = 1)
  * @return an int value indicating the relationship between the content of the two buffers
  */
 template <typename T>
-static FORCEINLINE int MemCmpT(const T *ptr1, const T *ptr2, uint num = 1)
+static FORCEINLINE int MemCmpT(const T *ptr1, const T *ptr2, size_t num = 1)
 {
 	return memcmp(ptr1, ptr2, num * sizeof(T));
 }
@@ -87,7 +87,7 @@ static FORCEINLINE void MemReverseT(T *ptr1, T *ptr2)
  * @param num The number of items we want to reverse.
  */
 template <typename T>
-static FORCEINLINE void MemReverseT(T *ptr, uint num)
+static FORCEINLINE void MemReverseT(T *ptr, size_t num)
 {
 	assert(ptr != NULL);