diff --git a/src/Sema.zig b/src/Sema.zig
index 9c553a0092..7448fd149c 100644
--- a/src/Sema.zig
+++ b/src/Sema.zig
@@ -6446,7 +6446,12 @@ fn analyzeCall(
             .extern_fn => return sema.fail(block, call_src, "{s} call of extern function", .{
                 @as([]const u8, if (is_comptime_call) "comptime" else "inline"),
             }),
-            else => unreachable,
+            else => {
+                assert(callee_ty.isPtrAtRuntime());
+                return sema.fail(block, call_src, "{s} call of function pointer", .{
+                    @as([]const u8, if (is_comptime_call) "comptime" else "inline"),
+                });
+            },
         };
         if (func_ty_info.is_var_args) {
             return sema.fail(block, call_src, "{s} call of variadic function", .{
diff --git a/test/cases/compile_errors/comptime_call_of_function_pointer.zig b/test/cases/compile_errors/comptime_call_of_function_pointer.zig
new file mode 100644
index 0000000000..cf01f5ea2c
--- /dev/null
+++ b/test/cases/compile_errors/comptime_call_of_function_pointer.zig
@@ -0,0 +1,10 @@
+export fn entry() void {
+    const fn_ptr = @intToPtr(*align(1) fn () void, 0xffd2);
+    comptime fn_ptr();
+}
+
+// error
+// backend=stage2
+// target=native
+//
+// :3:20: error: comptime call of function pointer