2 files changed, 3 insertions, 2 deletions
diff --git a/src/input/inputmanager.cpp b/src/input/inputmanager.cpp
index c84044771..74515e21d 100644
--- a/src/input/inputmanager.cpp
+++ b/src/input/inputmanager.cpp
@@ -282,7 +282,7 @@ void InputManager::makeDefault(const int i)
     }
 }
 
-bool InputManager::hasConflicts(int &key1, int &key2) const
+bool InputManager::hasConflicts(int &restrict key1, int &restrict key2) const
 {
     /**
      * No need to parse the square matrix: only check one triangle
diff --git a/src/input/inputmanager.h b/src/input/inputmanager.h
index 595900303..cb775ee9c 100644
--- a/src/input/inputmanager.h
+++ b/src/input/inputmanager.h
@@ -111,7 +111,8 @@ class InputManager final
 
         void makeDefault(const int i);
 
-        bool hasConflicts(int &key1, int &key2) const A_WARN_UNUSED;
+        bool hasConflicts(int &restrict key1,
+                          int &restrict key2) const A_WARN_UNUSED;
 
         void callbackNewKey();