diff --git a/config.def.h b/config.def.h
index 79a7d36..4b3efbf 100644
--- a/config.def.h
+++ b/config.def.h
@@ -189,8 +189,8 @@ static Shortcut shortcuts[] = {
 	{ MODKEY,	            XK_k,           kscrollup,		{.i =  1} },
 	{ MODKEY,	            XK_j,           kscrolldown,	{.i =  1} },
 	{ MODKEY,				XK_U,           zoom,           {.f = +1} },
-	{ MODKEY,				XK_U,           zoom,           {.f = +1} },
-	{ MODKEY,				XK_I,           zoom,           {.f = -1} },
+	{ MODKEY|ShiftMask,		XK_U,           zoom,           {.f = +1} },
+	{ MODKEY|ShiftMask,		XK_I,           zoom,           {.f = -1} },
 };
 
 /*
diff --git a/config.h b/config.h
index 79a7d36..4b3efbf 100644
--- a/config.h
+++ b/config.h
@@ -189,8 +189,8 @@ static Shortcut shortcuts[] = {
 	{ MODKEY,	            XK_k,           kscrollup,		{.i =  1} },
 	{ MODKEY,	            XK_j,           kscrolldown,	{.i =  1} },
 	{ MODKEY,				XK_U,           zoom,           {.f = +1} },
-	{ MODKEY,				XK_U,           zoom,           {.f = +1} },
-	{ MODKEY,				XK_I,           zoom,           {.f = -1} },
+	{ MODKEY|ShiftMask,		XK_U,           zoom,           {.f = +1} },
+	{ MODKEY|ShiftMask,		XK_I,           zoom,           {.f = -1} },
 };
 
 /*