diff --git a/AK/Debug.h.in b/AK/Debug.h.in
index 3e9bbb5ce5..9c4525767f 100644
--- a/AK/Debug.h.in
+++ b/AK/Debug.h.in
@@ -478,6 +478,10 @@
 #    cmakedefine01 WASI_DEBUG
 #endif
 
+#ifndef WASI_FINE_GRAINED_DEBUG
+#    cmakedefine01 WASI_FINE_GRAINED_DEBUG
+#endif
+
 #ifndef WASM_BINPARSER_DEBUG
 #    cmakedefine01 WASM_BINPARSER_DEBUG
 #endif
diff --git a/Meta/CMake/all_the_debug_macros.cmake b/Meta/CMake/all_the_debug_macros.cmake
index ee82e3a84d..8e986fe121 100644
--- a/Meta/CMake/all_the_debug_macros.cmake
+++ b/Meta/CMake/all_the_debug_macros.cmake
@@ -197,6 +197,7 @@ set(VPX_DEBUG ON)
 set(WAITBLOCK_DEBUG ON)
 set(WAITQUEUE_DEBUG ON)
 set(WASI_DEBUG ON)
+set(WASI_FINE_GRAINED_DEBUG ON)
 set(WASM_BINPARSER_DEBUG ON)
 set(WASM_TRACE_DEBUG ON)
 set(WASM_VALIDATOR_DEBUG ON)
diff --git a/Userland/Libraries/LibWasm/WASI/Wasi.cpp b/Userland/Libraries/LibWasm/WASI/Wasi.cpp
index b2e145a6de..68a2ac9684 100644
--- a/Userland/Libraries/LibWasm/WASI/Wasi.cpp
+++ b/Userland/Libraries/LibWasm/WASI/Wasi.cpp
@@ -636,12 +636,16 @@ ErrorOr<Result<FD>> Implementation::impl$path_open(Configuration& configuration,
     auto path_data = TRY(slice_typed_memory(configuration, path, path_len));
     auto path_string = DeprecatedString::copy(path_data);
 
+    dbgln_if(WASI_FINE_GRAINED_DEBUG, "path_open: dir_fd={}, path={}, open_flags={}", dir_fd, path_string, open_flags);
+
     int opened_fd = openat(dir_fd, path_string.characters(), open_flags, 0644);
     if (opened_fd < 0)
         return errno_value_from_errno(errno);
 
     // FIXME: Implement Rights and RightsInheriting.
 
+    m_fd_map.insert(opened_fd, static_cast<u32>(opened_fd));
+
     return FD(opened_fd);
 }