diff --git a/MobileGL/MG_Impl/GLImpl/Texture/GL_Texture.cpp b/MobileGL/MG_Impl/GLImpl/Texture/GL_Texture.cpp
index 9009930b..db15206f 100644
--- a/MobileGL/MG_Impl/GLImpl/Texture/GL_Texture.cpp
+++ b/MobileGL/MG_Impl/GLImpl/Texture/GL_Texture.cpp
@@ -3059,6 +3059,15 @@ namespace MobileGL::MG_Impl::GLImpl {
                 *params = textureObject->GetSamplerObject()->GetMaxAnisotropy();
             }
             break;
+        // GL 4.6 core 8.11 lists this among the parameters EVERY GetTexParameter form answers.
+        // It was handled by the iv/Iiv/Iuiv getters and missed by this one, so the float query
+        // raised GL_INVALID_ENUM and left the caller's float untouched - which is what
+        // KHR-GL4x.shader_image_load_store.basic-api-texParam reads back.
+        case GL_IMAGE_FORMAT_COMPATIBILITY_TYPE:
+            if (params) {
+                *params = static_cast<GLfloat>(GL_IMAGE_FORMAT_COMPATIBILITY_BY_SIZE);
+            }
+            break;
         case GL_DEPTH_STENCIL_TEXTURE_MODE:
             if (params) {
                 *params = static_cast<GLfloat>(textureObject->GetDepthStencilTextureMode());
diff --git a/MobileGL/MG_Test/Texture/TextureTest.cpp b/MobileGL/MG_Test/Texture/TextureTest.cpp
index 953a8929..a7079b9a 100644
--- a/MobileGL/MG_Test/Texture/TextureTest.cpp
+++ b/MobileGL/MG_Test/Texture/TextureTest.cpp
@@ -4809,3 +4809,41 @@ TEST_F(TextureTest, CopyImageSubDataDoesNotApplyMipmapCompletenessToMultisampleT
     EXPECT_TRUE(g_copyImageSubDataCall.Called);
     EXPECT_EQ(MG_Impl::GLImpl::GetError(), GL_NO_ERROR);
 }
+
+// GL 4.6 core 8.11 makes GL_IMAGE_FORMAT_COMPATIBILITY_TYPE readable through every
+// GetTexParameter form. Three of MobileGL's four getters answered it and glGetTexParameterfv did
+// not, so the float query raised GL_INVALID_ENUM and left the caller's float uninitialised
+// (KHR-GL4x.shader_image_load_store.basic-api-texParam reads it with both iv and fv and compares
+// them). Asserted across all four here, because an enum present in three of four parallel
+// switches is the drift shape that comes back.
+TEST_F(TextureTest, ImageFormatCompatibilityTypeAgreesAcrossEveryTexParameterGetter) {
+    GLuint texture = 0;
+    MG_Impl::GLImpl::GenTextures(1, &texture);
+    MG_Impl::GLImpl::BindTexture(GL_TEXTURE_2D, texture);
+    MG_Impl::GLImpl::TexStorage2D(GL_TEXTURE_2D, 1, GL_RGBA8, 4, 4);
+    DrainPendingGlErrors();
+
+    GLint integerValue = 0;
+    MG_Impl::GLImpl::GetTexParameteriv(GL_TEXTURE_2D, GL_IMAGE_FORMAT_COMPATIBILITY_TYPE, &integerValue);
+    EXPECT_EQ(integerValue, GL_IMAGE_FORMAT_COMPATIBILITY_BY_SIZE);
+    EXPECT_EQ(MG_Impl::GLImpl::GetError(), GL_NO_ERROR);
+
+    GLfloat floatValue = 0.0f;
+    MG_Impl::GLImpl::GetTexParameterfv(GL_TEXTURE_2D, GL_IMAGE_FORMAT_COMPATIBILITY_TYPE, &floatValue);
+    EXPECT_FLOAT_EQ(floatValue, static_cast<GLfloat>(GL_IMAGE_FORMAT_COMPATIBILITY_BY_SIZE));
+    EXPECT_EQ(MG_Impl::GLImpl::GetError(), GL_NO_ERROR);
+
+    GLint signedValue = 0;
+    MG_Impl::GLImpl::GetTexParameterIiv(GL_TEXTURE_2D, GL_IMAGE_FORMAT_COMPATIBILITY_TYPE, &signedValue);
+    EXPECT_EQ(signedValue, GL_IMAGE_FORMAT_COMPATIBILITY_BY_SIZE);
+    EXPECT_EQ(MG_Impl::GLImpl::GetError(), GL_NO_ERROR);
+
+    GLuint unsignedValue = 0;
+    MG_Impl::GLImpl::GetTexParameterIuiv(GL_TEXTURE_2D, GL_IMAGE_FORMAT_COMPATIBILITY_TYPE, &unsignedValue);
+    EXPECT_EQ(unsignedValue, static_cast<GLuint>(GL_IMAGE_FORMAT_COMPATIBILITY_BY_SIZE));
+    EXPECT_EQ(MG_Impl::GLImpl::GetError(), GL_NO_ERROR);
+
+    MG_Impl::GLImpl::BindTexture(GL_TEXTURE_2D, 0);
+    MG_Impl::GLImpl::DeleteTextures(1, &texture);
+    DrainPendingGlErrors();
+}