diff --git a/src/codegen/x86_64/CodeGen.zig b/src/codegen/x86_64/CodeGen.zig
index 9ba98c3e833cc11ff996a61a7d624a62ebdda3fa..50b5bdc15035ac7341b00ec4b6fe60902291965c 100644
--- a/src/codegen/x86_64/CodeGen.zig
+++ b/src/codegen/x86_64/CodeGen.zig
@@ -170801,6 +170801,7 @@ fn genBody(cg: *CodeGen, body: []const Air.Inst.Index) InnerError!void {
                     else => |e| return e,
                 };
                 try ops[0].toSlicePtr(cg);
+                try ops[1].toSlicePtr(cg);
                 cg.select(&.{}, &.{}, &ops, switch (air_tag) {
                     else => unreachable,
                     inline .memcpy, .memmove => |symbol| comptime &.{.{
diff --git a/test/behavior/array.zig b/test/behavior/array.zig
index 2bd85555297beed2d7b33de499e272ddc639a175..2f3aa841bc58fc9494e88f0c918744c4de0eb0e5 100644
--- a/test/behavior/array.zig
+++ b/test/behavior/array.zig
@@ -45,6 +45,18 @@ fn getArrayLen(a: []const u32) usize {
     return a.len;
 }
 
+test "runtime array concat with comptime slice" {
+    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_spirv) return error.SkipZigTest;
+
+    var a: [1]u8 = .{1};
+    const b = (comptime @as([]const u8, &.{0})) ++ &a;
+    const c = &a ++ (comptime @as([]const u8, &.{0}));
+    try std.testing.expectEqualSlices(u8, &.{ 0, 1 }, b);
+    try std.testing.expectEqualSlices(u8, &.{ 1, 0 }, c);
+}
+
 test "array concat with undefined" {
     if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
     if (builtin.zig_backend == .stage2_spirv) return error.SkipZigTest;