diff --git a/config-verify.c b/config-verify.c
index 6a5278b..ae6e41d 100644
--- a/config-verify.c
+++ b/config-verify.c
@@ -164,6 +164,8 @@ conf_verify_on_click(keychain_t *chain, const struct yml_node *node)
         {"left", false, &conf_verify_string},
         {"middle", false, &conf_verify_string},
         {"right", false, &conf_verify_string},
+        {"wheel-up", false, &conf_verify_string},
+        {"wheel-down", false, &conf_verify_string},
         {NULL, false, NULL},
     };
 
diff --git a/config.c b/config.c
index b2e131c..956eba9 100644
--- a/config.c
+++ b/config.c
@@ -160,6 +160,10 @@ conf_to_particle(const struct yml_node *node, struct conf_inherit inherited)
                     on_click_templates[MOUSE_BTN_MIDDLE] = template;
                 else if (strcmp(key, "right") == 0)
                     on_click_templates[MOUSE_BTN_RIGHT] = template;
+                else if (strcmp(key, "wheel-up") == 0)
+                    on_click_templates[MOUSE_BTN_WHEEL_UP] = template;
+                else if (strcmp(key, "wheel-down") == 0)
+                    on_click_templates[MOUSE_BTN_WHEEL_DOWN] = template;
                 else
                     assert(false);
             }
diff --git a/particle.c b/particle.c
index ea4bb62..16eb738 100644
--- a/particle.c
+++ b/particle.c
@@ -161,6 +161,8 @@ exposable_default_on_mouse(struct exposable *exposable, struct bar *bar,
         [MOUSE_BTN_MIDDLE] = "middle",
         [MOUSE_BTN_RIGHT] = "right",
         [MOUSE_BTN_COUNT] = "count",
+        [MOUSE_BTN_WHEEL_UP] = "wheel-up",
+        [MOUSE_BTN_WHEEL_DOWN] = "wheel-down",
     };
     LOG_DBG("on_mouse: exposable=%p, event=%s, btn=%s, x=%d, y=%d (on-click=%s)",
             exposable, event == ON_MOUSE_MOTION ? "motion" : "click",
diff --git a/particle.h b/particle.h
index 4e449f3..4ca520f 100644
--- a/particle.h
+++ b/particle.h
@@ -17,6 +17,8 @@ enum mouse_button {
     MOUSE_BTN_LEFT,
     MOUSE_BTN_MIDDLE,
     MOUSE_BTN_RIGHT,
+    MOUSE_BTN_WHEEL_UP,
+    MOUSE_BTN_WHEEL_DOWN,
 
     MOUSE_BTN_COUNT,
 };