diff --git a/Gems/Atom/Tools/MaterialEditor/Code/Source/Platform/Linux/MaterialEditor_Traits_Linux.h b/Gems/Atom/Tools/MaterialEditor/Code/Source/Platform/Linux/MaterialEditor_Traits_Linux.h
index 368b681b4c..03320d1dd8 100644
--- a/Gems/Atom/Tools/MaterialEditor/Code/Source/Platform/Linux/MaterialEditor_Traits_Linux.h
+++ b/Gems/Atom/Tools/MaterialEditor/Code/Source/Platform/Linux/MaterialEditor_Traits_Linux.h
@@ -6,6 +6,3 @@
  *
  */
 #pragma once
-
-#define AZ_TRAIT_MATERIALEDITOR_EXT ""
-
diff --git a/Gems/Atom/Tools/MaterialEditor/Code/Source/Platform/Mac/MaterialEditor_Traits_Mac.h b/Gems/Atom/Tools/MaterialEditor/Code/Source/Platform/Mac/MaterialEditor_Traits_Mac.h
index 2f46a3a12f..03320d1dd8 100644
--- a/Gems/Atom/Tools/MaterialEditor/Code/Source/Platform/Mac/MaterialEditor_Traits_Mac.h
+++ b/Gems/Atom/Tools/MaterialEditor/Code/Source/Platform/Mac/MaterialEditor_Traits_Mac.h
@@ -6,6 +6,3 @@
  *
  */
 #pragma once
-
-#define AZ_TRAIT_MATERIALEDITOR_EXT ".app"
-
diff --git a/Gems/Atom/Tools/MaterialEditor/Code/Source/Platform/Windows/MaterialEditor_Traits_Windows.h b/Gems/Atom/Tools/MaterialEditor/Code/Source/Platform/Windows/MaterialEditor_Traits_Windows.h
index 2f016a2488..03320d1dd8 100644
--- a/Gems/Atom/Tools/MaterialEditor/Code/Source/Platform/Windows/MaterialEditor_Traits_Windows.h
+++ b/Gems/Atom/Tools/MaterialEditor/Code/Source/Platform/Windows/MaterialEditor_Traits_Windows.h
@@ -6,6 +6,3 @@
  *
  */
 #pragma once
-
-#define AZ_TRAIT_MATERIALEDITOR_EXT ".exe"
-