diff --git a/src/6.pbr/2.2.1.ibl_specular/ibl_specular.cpp b/src/6.pbr/2.2.1.ibl_specular/ibl_specular.cpp
index b44955c..5b38b95 100644
--- a/src/6.pbr/2.2.1.ibl_specular/ibl_specular.cpp
+++ b/src/6.pbr/2.2.1.ibl_specular/ibl_specular.cpp
@@ -259,7 +259,7 @@ int main()
     glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
     glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
     glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
-    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); // be sure to set minifcation filter to mip_linear 
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); // be sure to set minification filter to mip_linear 
     glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
     // generate mipmaps for the cubemap so OpenGL automatically allocates the required memory.
     glGenerateMipmap(GL_TEXTURE_CUBE_MAP);
diff --git a/src/6.pbr/2.2.2.ibl_specular_textured/ibl_specular_textured.cpp b/src/6.pbr/2.2.2.ibl_specular_textured/ibl_specular_textured.cpp
index 3ac8794..c22aa9d 100644
--- a/src/6.pbr/2.2.2.ibl_specular_textured/ibl_specular_textured.cpp
+++ b/src/6.pbr/2.2.2.ibl_specular_textured/ibl_specular_textured.cpp
@@ -296,7 +296,7 @@ int main()
     glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
     glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
     glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
-    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); // be sure to set minifcation filter to mip_linear 
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); // be sure to set minification filter to mip_linear 
     glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
     // generate mipmaps for the cubemap so OpenGL automatically allocates the required memory.
     glGenerateMipmap(GL_TEXTURE_CUBE_MAP);