diff --git a/clang/lib/CodeGen/CGOpenMPRuntime.cpp b/clang/lib/CodeGen/CGOpenMPRuntime.cpp
--- a/clang/lib/CodeGen/CGOpenMPRuntime.cpp
+++ b/clang/lib/CodeGen/CGOpenMPRuntime.cpp
@@ -3022,6 +3022,13 @@
     // This could happen if the device compilation is invoked standalone.
     if (!hasTargetRegionEntryInfo(DeviceID, FileID, ParentName, LineNum))
       return;
+
+    // If we are registering a ctor / dtor we need to make sure it's externally
+    // visible so we can call it from the host.
+    if (Flags == OMPTargetRegionEntryCtor || Flags == OMPTargetRegionEntryDtor)
+      if (llvm::GlobalValue *GV = dyn_cast<llvm::GlobalValue>(Addr))
+        GV->setLinkage(llvm::GlobalValue::WeakODRLinkage);
+
     auto &Entry =
         OffloadEntriesTargetRegion[DeviceID][FileID][ParentName][LineNum];
     Entry.setAddress(Addr);
diff --git a/clang/test/OpenMP/nvptx_declare_target_var_ctor_dtor_codegen.cpp b/clang/test/OpenMP/nvptx_declare_target_var_ctor_dtor_codegen.cpp
--- a/clang/test/OpenMP/nvptx_declare_target_var_ctor_dtor_codegen.cpp
+++ b/clang/test/OpenMP/nvptx_declare_target_var_ctor_dtor_codegen.cpp
@@ -44,7 +44,7 @@
 static int c = foo() + bar() + baz();
 #pragma omp declare target (c)
 // HOST-DAG: @[[C_CTOR:__omp_offloading__.+_c_l44_ctor]] = private constant i8 0
-// DEVICE-DAG: define internal void [[C_CTOR:@__omp_offloading__.+_c_l44_ctor]]()
+// DEVICE-DAG: define weak_odr dso_local void [[C_CTOR:@__omp_offloading__.+_c_l44_ctor]]()
 // DEVICE-DAG: call noundef i32 [[FOO]]()
 // DEVICE-DAG: call noundef i32 [[BAR]]()
 // DEVICE-DAG: call noundef i32 [[BAZ]]()
@@ -61,14 +61,14 @@
 S cd = doo() + car() + caz() + baz();
 #pragma omp end declare target
 // HOST-DAG: @[[CD_CTOR:__omp_offloading__.+_cd_l61_ctor]] = private constant i8 0
-// DEVICE-DAG: define internal void [[CD_CTOR:@__omp_offloading__.+_cd_l61_ctor]]()
+// DEVICE-DAG: define weak_odr dso_local void [[CD_CTOR:@__omp_offloading__.+_cd_l61_ctor]]()
 // DEVICE-DAG: call noundef i32 [[DOO]]()
 // DEVICE-DAG: call noundef i32 [[CAR]]()
 // DEVICE-DAG: call noundef i32 [[CAZ]]()
 // DEVICE-DAG: ret void
 
 // HOST-DAG: @[[CD_DTOR:__omp_offloading__.+_cd_l61_dtor]] = private constant i8 0
-// DEVICE-DAG: define internal void [[CD_DTOR:@__omp_offloading__.+_cd_l61_dtor]]()
+// DEVICE-DAG: define weak_odr dso_local void [[CD_DTOR:@__omp_offloading__.+_cd_l61_dtor]]()
 // DEVICE-DAG: call void
 // DEVICE-DAG: ret void