diff --git a/doc/opengl-support.dox b/doc/opengl-support.dox
index f103f292b..7780c5b66 100644
--- a/doc/opengl-support.dox
+++ b/doc/opengl-support.dox
@@ -222,6 +222,7 @@ following:
 @extension{EXT,texture_filter_anisotropic} (also in ES) | done
 @extension{EXT,texture_mirror_clamp}         | only GL 4.4 subset
 @extension{EXT,direct_state_access}          | done for implemented functionality
+@extension{EXT,shader_integer_mix} (also in ES) | done (shading language only)
 @extension2{EXT,debug_label} (also in ES)    | missing pipeline, transform feedback and sampler label
 @extension2{EXT,debug_marker} (also in ES)   | missing marker groups
 @extension{GREMEDY,string_marker}            | done
diff --git a/src/Magnum/Context.cpp b/src/Magnum/Context.cpp
index 7055aa9c3..66b4d90fe 100644
--- a/src/Magnum/Context.cpp
+++ b/src/Magnum/Context.cpp
@@ -61,6 +61,7 @@ const std::vector<Extension>& Extension::extensions(Version version) {
         _extension(GL,EXT,texture_filter_anisotropic),
         _extension(GL,EXT,texture_mirror_clamp),
         _extension(GL,EXT,direct_state_access),
+        _extension(GL,EXT,shader_integer_mix),
         _extension(GL,EXT,debug_label),
         _extension(GL,EXT,debug_marker),
         _extension(GL,GREMEDY,string_marker)};
diff --git a/src/Magnum/Extensions.h b/src/Magnum/Extensions.h
index d9271cffc..841d5710c 100644
--- a/src/Magnum/Extensions.h
+++ b/src/Magnum/Extensions.h
@@ -182,6 +182,7 @@ namespace GL {
         _extension(GL,EXT,transform_feedback,           GL210, GL300) // #352
         _extension(GL,EXT,direct_state_access,          GL210,  None) // #353
         _extension(GL,EXT,texture_snorm,                GL300, GL310) // #365
+        _extension(GL,EXT,shader_integer_mix,           GL300,  None) // #437
         _extension(GL,EXT,debug_label,                  GL210,  None) // #439
         _extension(GL,EXT,debug_marker,                 GL210,  None) // #440
     } namespace GREMEDY {
@@ -245,6 +246,9 @@ namespace GL {
         _extension(GL,EXT,map_buffer_range,         GLES200, GLES300) // #121
         #endif
         _extension(GL,EXT,disjoint_timer_query,     GLES200,    None) // #150
+        #ifndef MAGNUM_TARGET_GLES2
+        _extension(GL,EXT,shader_integer_mix,       GLES300,    None) // #161
+        #endif
     } namespace KHR {
         _extension(GL,KHR,debug,                    GLES200,    None) // #118
     } namespace NV {