diff --git a/examples/example_glfw_opengl3/main.cpp b/examples/example_glfw_opengl3/main.cpp
index 30943301f..aa43471a8 100644
--- a/examples/example_glfw_opengl3/main.cpp
+++ b/examples/example_glfw_opengl3/main.cpp
@@ -56,7 +56,7 @@ int main(int, char**)
         return 1;
 
     // Decide GL+GLSL versions
-#if __APPLE__
+#ifdef __APPLE__
     // GL 3.2 + GLSL 150
     const char* glsl_version = "#version 150";
     glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
diff --git a/examples/example_sdl_opengl3/main.cpp b/examples/example_sdl_opengl3/main.cpp
index 92d031389..c61bc5447 100644
--- a/examples/example_sdl_opengl3/main.cpp
+++ b/examples/example_sdl_opengl3/main.cpp
@@ -48,7 +48,7 @@ int main(int, char**)
     }
 
     // Decide GL+GLSL versions
-#if __APPLE__
+#ifdef __APPLE__
     // GL 3.2 Core + GLSL 150
     const char* glsl_version = "#version 150";
     SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, SDL_GL_CONTEXT_FORWARD_COMPATIBLE_FLAG); // Always required on Mac
diff --git a/imgui.h b/imgui.h
index 67516adcd..9bf7ff358 100644
--- a/imgui.h
+++ b/imgui.h
@@ -1310,7 +1310,7 @@ enum ImGuiSliderFlags_
 
     // Obsolete names (will be removed)
 #ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
-    , ImGuiSliderFlags_ClampOnInput = ImGuiSliderFlags_AlwaysClamp, // [renamed in 1.79]
+    , ImGuiSliderFlags_ClampOnInput = ImGuiSliderFlags_AlwaysClamp // [renamed in 1.79]
 #endif
 };
 
@@ -1408,8 +1408,8 @@ struct ImVector
     inline int          size_in_bytes() const               { return Size * (int)sizeof(T); }
     inline int          max_size() const                    { return 0x7FFFFFFF / (int)sizeof(T); }
     inline int          capacity() const                    { return Capacity; }
-    inline T&           operator[](int i)                   { IM_ASSERT(i < Size); return Data[i]; }
-    inline const T&     operator[](int i) const             { IM_ASSERT(i < Size); return Data[i]; }
+    inline T&           operator[](int i)                   { IM_ASSERT(i >= 0 && i < Size); return Data[i]; }
+    inline const T&     operator[](int i) const             { IM_ASSERT(i >= 0 && i < Size); return Data[i]; }
 
     inline void         clear()                             { if (Data) { Size = Capacity = 0; IM_FREE(Data); Data = NULL; } }
     inline T*           begin()                             { return Data; }