diff --git a/base/loading.jl b/base/loading.jl
index d7382e1f879484..3b3d3461cda35d 100644
--- a/base/loading.jl
+++ b/base/loading.jl
@@ -693,6 +693,14 @@ function manifest_uuid_path(env::String, pkg::PkgId)::Union{Nothing,String,Missi
             # if `pkg` matches the project, return the project itself
             return project_file_path(project_file)
         end
+        base_project_file = base_project(project_file)
+        if base_proejct_file !== nothing
+            base_proj = project_file_name_uuid(base_project_file, pkg.name)
+            if base_proj == pkg
+                # if `pkg` matches the project, return the project itself
+                return project_file_path(base_project_file)
+            end
+        end
         mby_ext = project_file_ext_path(project_file, pkg.name)
         mby_ext === nothing || return mby_ext
         # look for manifest file and `where` stanza
diff --git a/test/loading.jl b/test/loading.jl
index b621ba44237f0f..56a2e34910b86a 100644
--- a/test/loading.jl
+++ b/test/loading.jl
@@ -1561,6 +1561,8 @@ end
        @test isfile(Base.locate_package(id))
        id2 = Base.identify_package("Devved2")
        @test isfile(Base.locate_package(id2))
+       id3 = Base.identify_package("MyPkg")
+       @test isfile(Base.locate_package(id3))
    finally
        copy!(LOAD_PATH, old_load_path)
    end
diff --git a/test/project/SubProject/Manifest.toml b/test/project/SubProject/Manifest.toml
new file mode 100644
index 00000000000000..1ea3c408cebfa0
--- /dev/null
+++ b/test/project/SubProject/Manifest.toml
@@ -0,0 +1,15 @@
+# This file is machine-generated - editing it directly is not advised
+
+julia_version = "1.12.0-DEV"
+manifest_format = "2.0"
+project_hash = "620b9377bc807ff657e6618c8ccc24887eb40285"
+
+[[deps.Devved]]
+path = "Devved"
+uuid = "cbce3a6e-7a3d-4e84-8e6d-b87208df7599"
+version = "0.1.0"
+
+[[deps.Devved2]]
+path = "Devved2"
+uuid = "08f74b90-50f5-462f-80b9-a72b1258a17b"
+version = "0.1.0"
diff --git a/test/project/SubProject/Project.toml b/test/project/SubProject/Project.toml
index b4ef3b6a082a72..8540f445bd0972 100644
--- a/test/project/SubProject/Project.toml
+++ b/test/project/SubProject/Project.toml
@@ -1,3 +1,6 @@
+name = "MyPkg"
+uuid = "0cafdeb2-d7a2-40d0-8d22-4411fcc2c4ee"
+
 subprojects = ["sub"]
 
 [deps]
diff --git a/test/project/SubProject/src/MyPkg.jl b/test/project/SubProject/src/MyPkg.jl
new file mode 100644
index 00000000000000..6d84954645d553
--- /dev/null
+++ b/test/project/SubProject/src/MyPkg.jl
@@ -0,0 +1,3 @@
+module MyPkg
+
+end