diff --git a/Gems/AtomLyIntegration/AtomFont/Code/Include/AtomLyIntegration/AtomFont/FontTexture.h b/Gems/AtomLyIntegration/AtomFont/Code/Include/AtomLyIntegration/AtomFont/FontTexture.h
index b9bdce6810..f20b0463d9 100644
--- a/Gems/AtomLyIntegration/AtomFont/Code/Include/AtomLyIntegration/AtomFont/FontTexture.h
+++ b/Gems/AtomLyIntegration/AtomFont/Code/Include/AtomLyIntegration/AtomFont/FontTexture.h
@@ -39,7 +39,7 @@ namespace AZ
         void Reset()
         {
             m_slotUsage = 0;
-            m_currentCharacter = ~0;
+            m_currentCharacter = std::numeric_limits<uint32_t>::max();
             m_horizontalAdvance = 0;
             m_characterWidth = 0;
             m_characterHeight = 0;
diff --git a/Gems/AtomLyIntegration/AtomFont/Code/Include/AtomLyIntegration/AtomFont/GlyphCache.h b/Gems/AtomLyIntegration/AtomFont/Code/Include/AtomLyIntegration/AtomFont/GlyphCache.h
index 8c6cf721b3..271b6810d3 100644
--- a/Gems/AtomLyIntegration/AtomFont/Code/Include/AtomLyIntegration/AtomFont/GlyphCache.h
+++ b/Gems/AtomLyIntegration/AtomFont/Code/Include/AtomLyIntegration/AtomFont/GlyphCache.h
@@ -46,7 +46,7 @@ namespace AZ
         void            Reset()
         {
             m_usage = 0;
-            m_currentCharacter = ~0;
+            m_currentCharacter = std::numeric_limits<uint32_t>::max();
 
             m_characterWidth = 0;
             m_characterHeight = 0;
diff --git a/Gems/AtomLyIntegration/CommonFeatures/Code/Source/Material/EditorMaterialComponentSlot.h b/Gems/AtomLyIntegration/CommonFeatures/Code/Source/Material/EditorMaterialComponentSlot.h
index 79fddf2611..58d6fa9ab0 100644
--- a/Gems/AtomLyIntegration/CommonFeatures/Code/Source/Material/EditorMaterialComponentSlot.h
+++ b/Gems/AtomLyIntegration/CommonFeatures/Code/Source/Material/EditorMaterialComponentSlot.h
@@ -19,7 +19,7 @@ namespace AZ
 {
     namespace Render
     {
-        static const size_t DefaultMaterialSlotIndex = -1;
+        static const size_t DefaultMaterialSlotIndex = std::numeric_limits<size_t>::max();
 
         //! Details for a single editable material assignment
         struct EditorMaterialComponentSlot final