diff --git a/src/window/input.cpp b/src/window/input.cpp
index a4b4a913..8738f1fd 100644
--- a/src/window/input.cpp
+++ b/src/window/input.cpp
@@ -40,21 +40,22 @@ static std::unordered_map<std::string, int> mousecodes {
     {"left", GLFW_MOUSE_BUTTON_1},
     {"right", GLFW_MOUSE_BUTTON_2},
     {"middle", GLFW_MOUSE_BUTTON_3},
+    {"side1", GLFW_MOUSE_BUTTON_4},
+    {"side2", GLFW_MOUSE_BUTTON_5},
+    {"side3", GLFW_MOUSE_BUTTON_6},
+    {"side4", GLFW_MOUSE_BUTTON_7},
+    {"side5", GLFW_MOUSE_BUTTON_8},
 };
 
 static std::unordered_map<int, std::string> keynames {};
+static std::unordered_map<int, std::string> buttonsnames{};
 
 std::string input_util::get_name(mousecode code) {
-    switch (code) {
-        case mousecode::BUTTON_1:
-            return "left";
-        case mousecode::BUTTON_2:
-            return "right";
-        case mousecode::BUTTON_3:
-            return "middle";
-        default:
-            return "unknown";
+    auto found = buttonsnames.find(static_cast<int>(code));
+    if (found == buttonsnames.end()) {
+        return "unknown";
     }
+    return found->second;
 }
 
 std::string input_util::get_name(keycode code) {
@@ -91,6 +92,9 @@ void input_util::initialize() {
     for (const auto& entry : keycodes) {
         keynames[entry.second] = entry.first;
     }
+    for (const auto& entry : mousecodes) {
+        buttonsnames[entry.second] = entry.first;
+    }
 }
 
 keycode input_util::keycode_from(const std::string& name) {
@@ -210,6 +214,13 @@ std::string input_util::to_string(mousecode code) {
             return "RMB";
         case mousecode::BUTTON_3:
             return "MMB";
+        case mousecode::BUTTON_4:
+        case mousecode::BUTTON_5:
+        case mousecode::BUTTON_6:
+        case mousecode::BUTTON_7:
+        case mousecode::BUTTON_8:
+            return "XButton " + std::to_string(static_cast<int>(code) - 
+                static_cast<int>(mousecode::BUTTON_3));
         default:
             return "unknown button";
     }
diff --git a/src/window/input.hpp b/src/window/input.hpp
index ca532e82..0f94fca3 100644
--- a/src/window/input.hpp
+++ b/src/window/input.hpp
@@ -102,11 +102,17 @@ enum class mousecode : int {
     BUTTON_1 = 0,  // Left mouse button
     BUTTON_2 = 1,  // Right mouse button
     BUTTON_3 = 2,  // Middle mouse button
+    BUTTON_4 = 3,  // Side mouse button 1
+    BUTTON_5 = 4,  // Side mouse button 2
+    BUTTON_6 = 5,  // Side mouse button 3
+    BUTTON_7 = 6,  // Side mouse button 4
+    BUTTON_8 = 7,  // Side mouse button 5
     UNKNOWN = -1,
 };
 
 inline mousecode MOUSECODES_ALL[] {
-    mousecode::BUTTON_1, mousecode::BUTTON_2, mousecode::BUTTON_3};
+    mousecode::BUTTON_1, mousecode::BUTTON_2, mousecode::BUTTON_3, mousecode::BUTTON_4,
+    mousecode::BUTTON_5, mousecode::BUTTON_6, mousecode::BUTTON_7, mousecode::BUTTON_8 };
 
 namespace input_util {
     void initialize();