diff --git a/adc_pin_probe.cpp b/adc_pin_probe.cpp
index 4e62d08..e67a982 100644
--- a/adc_pin_probe.cpp
+++ b/adc_pin_probe.cpp
@@ -369,7 +369,25 @@ Fn load_symbol(ModuleHandle module, const char* name) {
 #endif
 }
 
+template <typename Fn>
+Fn load_symbol_optional(ModuleHandle module, const char* name) {
+#ifdef _WIN32
+    const auto addr = GetProcAddress(module, name);
+    return (addr != nullptr) ? reinterpret_cast<Fn>(addr) : nullptr;
+#else
+    dlerror();
+    void* addr = dlsym(module, name);
+    const char* error = dlerror();
+    if ((addr == nullptr) || (error != nullptr)) {
+        return nullptr;
+    }
+    return reinterpret_cast<Fn>(addr);
+#endif
+}
+
 struct Api {
+    using GetDevInfoFn = int32_t (*)(t_x502_hnd, t_x502_info*);
+
     ModuleHandle x502_module = nullptr;
     ModuleHandle e502_module = nullptr;
 
@@ -377,6 +395,7 @@ struct Api {
     decltype(&X502_Free) Free = nullptr;
     decltype(&X502_Close) Close = nullptr;
     decltype(&X502_GetErrorString) GetErrorString = nullptr;
+    GetDevInfoFn GetDevInfo = nullptr;
     decltype(&X502_GetDevInfo2) GetDevInfo2 = nullptr;
     decltype(&X502_SetMode) SetMode = nullptr;
     decltype(&X502_StreamsStop) StreamsStop = nullptr;
@@ -416,7 +435,11 @@ struct Api {
         Free = load_symbol<decltype(Free)>(x502_module, "X502_Free");
         Close = load_symbol<decltype(Close)>(x502_module, "X502_Close");
         GetErrorString = load_symbol<decltype(GetErrorString)>(x502_module, "X502_GetErrorString");
-        GetDevInfo2 = load_symbol<decltype(GetDevInfo2)>(x502_module, "X502_GetDevInfo2");
+        GetDevInfo = load_symbol_optional<GetDevInfoFn>(x502_module, "X502_GetDevInfo");
+        GetDevInfo2 = load_symbol_optional<decltype(GetDevInfo2)>(x502_module, "X502_GetDevInfo2");
+        if ((GetDevInfo == nullptr) && (GetDevInfo2 == nullptr)) {
+            fail("Neither X502_GetDevInfo2 nor X502_GetDevInfo is available in x502 API library");
+        }
         SetMode = load_symbol<decltype(SetMode)>(x502_module, "X502_SetMode");
         StreamsStop = load_symbol<decltype(StreamsStop)>(x502_module, "X502_StreamsStop");
         StreamsDisable = load_symbol<decltype(StreamsDisable)>(x502_module, "X502_StreamsDisable");
@@ -669,7 +692,11 @@ int run(const Config& cfg) {
     device.opened = true;
 
     t_x502_info info{};
-    err = api.GetDevInfo2(device.hnd, &info, sizeof(info));
+    if (api.GetDevInfo2 != nullptr) {
+        err = api.GetDevInfo2(device.hnd, &info, sizeof(info));
+    } else {
+        err = api.GetDevInfo(device.hnd, &info);
+    }
     expect_ok(api, err, "Get device info");
     print_device_info(info);