diff --git a/src/Window.zig b/src/Window.zig
index 13cdfa079..364a6c74c 100644
--- a/src/Window.zig
+++ b/src/Window.zig
@@ -598,52 +598,54 @@ fn keyCallback(
     }
 
     // Handle non-printable characters
-    const char: u8 = switch (@bitCast(u8, mods)) {
-        // No modifiers pressed at all
-        0 => @as(u8, switch (key) {
-            .backspace => 0x08,
-            .enter => '\r',
-            .tab => '\t',
-            .escape => 0x1B,
-            else => 0,
-        }),
+    if (action == .press or action == .repeat) {
+        const char: u8 = switch (@bitCast(u8, mods)) {
+            // No modifiers pressed at all
+            0 => @as(u8, switch (key) {
+                .backspace => 0x7F,
+                .enter => '\r',
+                .tab => '\t',
+                .escape => 0x1B,
+                else => 0,
+            }),
 
-        // Control only
-        @bitCast(u8, glfw.Mods{ .control = true }) => @as(u8, switch (key) {
-            .a => 0x01,
-            .b => 0x02,
-            .c => 0x03,
-            .d => 0x04,
-            .e => 0x05,
-            .f => 0x06,
-            .g => 0x07,
-            .h => 0x08,
-            .i => 0x09,
-            .j => 0x0A,
-            .k => 0x0B,
-            .l => 0x0C,
-            .m => 0x0D,
-            .n => 0x0E,
-            .o => 0x0F,
-            .p => 0x10,
-            .q => 0x11,
-            .r => 0x12,
-            .s => 0x13,
-            .t => 0x14,
-            .u => 0x15,
-            .v => 0x16,
-            .w => 0x17,
-            .x => 0x18,
-            .y => 0x19,
-            .z => 0x1A,
-            else => 0,
-        }),
+            // Control only
+            @bitCast(u8, glfw.Mods{ .control = true }) => @as(u8, switch (key) {
+                .a => 0x01,
+                .b => 0x02,
+                .c => 0x03,
+                .d => 0x04,
+                .e => 0x05,
+                .f => 0x06,
+                .g => 0x07,
+                .h => 0x08,
+                .i => 0x09,
+                .j => 0x0A,
+                .k => 0x0B,
+                .l => 0x0C,
+                .m => 0x0D,
+                .n => 0x0E,
+                .o => 0x0F,
+                .p => 0x10,
+                .q => 0x11,
+                .r => 0x12,
+                .s => 0x13,
+                .t => 0x14,
+                .u => 0x15,
+                .v => 0x16,
+                .w => 0x17,
+                .x => 0x18,
+                .y => 0x19,
+                .z => 0x1A,
+                else => 0,
+            }),
 
-        else => 0,
-    };
-    if (char > 0) {
-        win.queueWrite(&[1]u8{char}) catch |err|
-            log.err("error queueing write in keyCallback err={}", .{err});
+            else => 0,
+        };
+        if (char > 0) {
+            win.queueWrite(&[1]u8{char}) catch |err|
+                log.err("error queueing write in keyCallback err={}", .{err});
+        }
     }
 }