diff --git a/CHANGES.md b/CHANGES.md
index 12fd597..0ea31e1 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -7,6 +7,7 @@ Changes in Mini-XML 4.0.4
 
 - Fixed an issue when reporting errors with a `NULL` options pointer
   (Issue #329)
+- Fixed some compiler warnings (Issue #333)
 
 
 Changes in Mini-XML 4.0.3
diff --git a/mxml-attr.c b/mxml-attr.c
index 98dd5f5..29f6c7e 100644
--- a/mxml-attr.c
+++ b/mxml-attr.c
@@ -232,7 +232,7 @@ mxml_set_attr(mxml_node_t *node,	// I - Element node
               const char  *name,	// I - Attribute name
               char        *value)	// I - Attribute value
 {
-  int		i;			// Looping var
+  size_t	i;			// Looping var
   _mxml_attr_t	*attr;			// New attribute
 
 
diff --git a/mxml-index.c b/mxml-index.c
index 9da244b..52fe600 100644
--- a/mxml-index.c
+++ b/mxml-index.c
@@ -18,7 +18,7 @@
 
 static int	index_compare(mxml_index_t *ind, mxml_node_t *first, mxml_node_t *second);
 static int	index_find(mxml_index_t *ind, const char *element, const char *value, mxml_node_t *node);
-static void	index_sort(mxml_index_t *ind, int left, int right);
+static void	index_sort(mxml_index_t *ind, size_t left, size_t right);
 
 
 //
@@ -80,8 +80,8 @@ mxmlIndexFind(mxml_index_t *ind,	// I - Index to search
               const char   *element,	// I - Element name to find, if any
 	      const char   *value)	// I - Attribute value, if any
 {
-  int		diff,			// Difference between names
-		current,		// Current entity in search
+  int		diff;			// Difference between names
+  size_t	current,		// Current entity in search
 		first,			// First entity in search
 		last;			// Last entity in search
 
@@ -369,12 +369,12 @@ index_find(mxml_index_t *ind,		// I - Index
 
 static void
 index_sort(mxml_index_t *ind,		// I - Index to sort
-           int          left,		// I - Left node in partition
-	   int          right)		// I - Right node in partition
+           size_t       left,		// I - Left node in partition
+	   size_t       right)		// I - Right node in partition
 {
   mxml_node_t	*pivot,			// Pivot node
 		*temp;			// Swap node
-  int		templ,			// Temporary left node
+  size_t	templ,			// Temporary left node
 		tempr;			// Temporary right node
 
 
diff --git a/mxml-node.c b/mxml-node.c
index a6978c9..f7ab9f0 100644
--- a/mxml-node.c
+++ b/mxml-node.c
@@ -811,9 +811,13 @@ mxmlRelease(mxml_node_t *node)		// I - Node
       mxmlDelete(node);
       return (0);
     }
+    else if (node->ref_count < INT_MAX)
+    {
+      return ((int)node->ref_count);
+    }
     else
     {
-      return (node->ref_count);
+      return (INT_MAX);
     }
   }
   else
@@ -831,9 +835,18 @@ int					// O - New reference count
 mxmlRetain(mxml_node_t *node)		// I - Node
 {
   if (node)
-    return (++ node->ref_count);
+  {
+    node->ref_count ++;
+
+    if (node->ref_count < INT_MAX)
+      return ((int)node->ref_count);
+    else
+      return (INT_MAX);
+  }
   else
+  {
     return (-1);
+  }
 }