diff --git a/CInterface/Library/BaseLibrary.cpp b/CInterface/Library/BaseLibrary.cpp
index 738a0dc..678fd9b 100644
--- a/CInterface/Library/BaseLibrary.cpp
+++ b/CInterface/Library/BaseLibrary.cpp
@@ -18,7 +18,7 @@
     export bool simpleName##_TryGet(fullname* p, const char* name, const returnType*& out) {                           \
         ArbUt::BorrowedPtr<const returnType> o;                                                                        \
         auto v = p->TryGet(ArbUt::StringView::CalculateHash(name));                                                    \
-        if (v.has_value()) {                                                                                           \
+        if (!v.has_value()) {                                                                                          \
             out = nullptr;                                                                                             \
             return false;                                                                                              \
         } else {                                                                                                       \
@@ -30,7 +30,7 @@
     export bool simpleName##_TryGetWithHash(fullname* p, uint32_t hashedKey, const returnType*& out) {                 \
         ArbUt::BorrowedPtr<const returnType> o;                                                                        \
         auto v = p->TryGet(hashedKey);                                                                                 \
-        if (v.has_value()) {                                                                                           \
+        if (!v.has_value()) {                                                                                          \
             out = nullptr;                                                                                             \
             return false;                                                                                              \
         } else {                                                                                                       \