diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index a8db3199..dca1be02 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -49,7 +49,8 @@ jobs:
         shell: cmd
         run: |
           cd examples\example_null
-          "%VS_PATH%\VC\Auxiliary\Build\vcvarsall.bat" x64 && .\build_win32.bat /W4
+          call "%VS_PATH%\VC\Auxiliary\Build\vcvars64.bat" 
+          .\build_win32.bat /W4
 
       - name: Build example_null (single file build)
         shell: bash
@@ -71,14 +72,14 @@ jobs:
       - name: Build example_null (as DLL)
         shell: cmd
         run: |
-          "%VS_PATH%\VC\Auxiliary\Build\vcvarsall.bat" x64
-          echo '#ifdef _EXPORT'                                  >  example_single_file.cpp
-          echo '#  define IMGUI_API __declspec(dllexport)'       >> example_single_file.cpp
-          echo '#else'                                           >> example_single_file.cpp
-          echo '#  define IMGUI_API __declspec(dllimport)'       >> example_single_file.cpp
-          echo '#endif'                                          >> example_single_file.cpp
-          echo '#define IMGUI_IMPLEMENTATION'                    >> example_single_file.cpp
-          echo '#include "misc/single_file/imgui_single_file.h"' >> example_single_file.cpp
+          call "%VS_PATH%\VC\Auxiliary\Build\vcvars64.bat" 
+          echo #ifdef _EXPORT                                  >  example_single_file.cpp
+          echo #  define IMGUI_API __declspec(dllexport)       >> example_single_file.cpp
+          echo #else                                           >> example_single_file.cpp
+          echo #  define IMGUI_API __declspec(dllimport)       >> example_single_file.cpp
+          echo #endif                                          >> example_single_file.cpp
+          echo #define IMGUI_IMPLEMENTATION                    >> example_single_file.cpp
+          echo #include "misc/single_file/imgui_single_file.h" >> example_single_file.cpp
           cl.exe /D_USRDLL /D_WINDLL /D_EXPORT /I. example_single_file.cpp /LD /FeImGui.dll /link
           cl.exe /I. ImGui.lib /Feexample_null.exe examples/example_null/main.cpp
 
diff --git a/docs/CHANGELOG.txt b/docs/CHANGELOG.txt
index 0098b612..7564fae1 100644
--- a/docs/CHANGELOG.txt
+++ b/docs/CHANGELOG.txt
@@ -89,6 +89,7 @@ Other Changes:
 - Backends: OSX: Fix keypad-enter key not working on MacOS. (#3554) [@rokups, @lfnoise]
 - Examples: Apple+Metal: Consolidated/simplified to get closer to other examples. (#3543) [@warrenm]
 - Examples: Apple+Metal: Forward events down so OS key combination like Cmd+Q can work. (#3554) [@rokups]
+- CI: Fix testing for Windows DLL builds. (#3603, #3601) [@iboB]
 - Docs: Split examples/README.txt into docs/BACKENDS.md and docs/EXAMPLES.md improved them.
 - Docs: Consistently renamed all occurences of "binding" and "back-end" to "backend" in comments and docs.
 
diff --git a/imgui_internal.h b/imgui_internal.h
index 86816c51..afae7778 100644
--- a/imgui_internal.h
+++ b/imgui_internal.h
@@ -1127,8 +1127,8 @@ struct IMGUI_API ImGuiStackSizes
     short   SizeOfBeginPopupStack;
 
     ImGuiStackSizes() { memset(this, 0, sizeof(*this)); }
-    IMGUI_API void SetToCurrentState();
-    IMGUI_API void CompareWithCurrentState();
+    void SetToCurrentState();
+    void CompareWithCurrentState();
 };
 
 //-----------------------------------------------------------------------------