diff --git a/base/loading.jl b/base/loading.jl
index 0e2c13912a7de..453024d0686d7 100644
--- a/base/loading.jl
+++ b/base/loading.jl
@@ -1050,6 +1050,7 @@ const pkgorigins = Dict{PkgId,PkgOrigin}()
 
 function require(uuidkey::PkgId)
     @lock require_lock begin
+    just_loaded_pkg = false
     if !root_module_exists(uuidkey)
         cachefile = _require(uuidkey)
         if cachefile !== nothing
@@ -1059,6 +1060,11 @@ function require(uuidkey::PkgId)
         for callback in package_callbacks
             invokelatest(callback, uuidkey)
         end
+        just_loaded_pkg = true
+    end
+    if just_loaded_pkg && !root_module_exists(uuidkey)
+        error("package `$(uuidkey.name)` did not define the expected \
+              module `$(uuidkey.name)`, check for typos in package module name")
     end
     return root_module(uuidkey)
     end
diff --git a/test/loading.jl b/test/loading.jl
index c4cc23575e8d0..4391994830b89 100644
--- a/test/loading.jl
+++ b/test/loading.jl
@@ -745,3 +745,17 @@ end
         @test Base.get_deps(raw_manifest) == deps
     end
 end
+
+@testset "error message loading pkg bad module name" begin
+    mktempdir() do tmp
+        old_loadpath = copy(LOAD_PATH)
+        try
+            push!(LOAD_PATH, tmp)
+            write(joinpath(tmp, "BadCase.jl"), "module badcase end")
+            @test_throws ErrorException("package `BadCase` did not define the expected module `BadCase`, \
+                                        check for typos in package module name") (@eval using BadCase)
+        finally
+            copy!(LOAD_PATH, old_loadpath)
+        end
+    end
+end