diff --git a/GPU/GLES/DrawEngineGLES.cpp b/GPU/GLES/DrawEngineGLES.cpp
index 25822b470d..2241a18dd3 100644
--- a/GPU/GLES/DrawEngineGLES.cpp
+++ b/GPU/GLES/DrawEngineGLES.cpp
@@ -657,7 +657,7 @@ void DrawEngineGLES::TessellationDataTransferGLES::SendDataToShader(const float
 	data_tex[0] = renderManager_->CreateTexture(GL_TEXTURE_2D);
 	renderManager_->TextureImage(data_tex[0], 0, size, 1, GL_RGBA32F, GL_RGBA, GL_FLOAT, pos_data, GLRAllocType::NEW, false);
 	renderManager_->FinalizeTexture(data_tex[0], 0, false);
-	renderManager_->BindTexture(4, data_tex[0]);
+	renderManager_->BindTexture(TEX_SLOT_SPLINE_POS, data_tex[0]);
 
 	// Texcoords
 	if (hasTexCoords) {
@@ -668,7 +668,7 @@ void DrawEngineGLES::TessellationDataTransferGLES::SendDataToShader(const float
 		data_tex[1] = renderManager_->CreateTexture(GL_TEXTURE_2D);
 		renderManager_->TextureImage(data_tex[1], 0, size, 1, GL_RGBA32F, GL_RGBA, GL_FLOAT, tex_data, GLRAllocType::NEW, false);
 		renderManager_->FinalizeTexture(data_tex[1], 0, false);
-		renderManager_->BindTexture(5, data_tex[1]);
+		renderManager_->BindTexture(TEX_SLOT_SPLINE_NRM, data_tex[1]);
 	}
 
 	if (data_tex[2])
@@ -680,7 +680,7 @@ void DrawEngineGLES::TessellationDataTransferGLES::SendDataToShader(const float
 
 	renderManager_->TextureImage(data_tex[2], 0, sizeColor, 1, GL_RGBA32F, GL_RGBA, GL_FLOAT, col_data, GLRAllocType::NEW, false);
 	renderManager_->FinalizeTexture(data_tex[2], 0, false);
-	renderManager_->BindTexture(6, data_tex[2]);
+	renderManager_->BindTexture(TEX_SLOT_SPLINE_COL, data_tex[2]);
 }
 
 void DrawEngineGLES::TessellationDataTransferGLES::EndFrame() {
diff --git a/GPU/GLES/DrawEngineGLES.h b/GPU/GLES/DrawEngineGLES.h
index 42e4ce5133..535535d42e 100644
--- a/GPU/GLES/DrawEngineGLES.h
+++ b/GPU/GLES/DrawEngineGLES.h
@@ -41,6 +41,17 @@ struct TransformedVertex;
 
 struct DecVtxFormat;
 
+enum {
+	TEX_SLOT_PSP_TEXTURE = 0,
+	TEX_SLOT_SHADERBLEND_SRC = 1,
+	TEX_SLOT_ALPHATEST = 2,
+	TEX_SLOT_CLUT = 3,
+	TEX_SLOT_SPLINE_POS = 4,
+	TEX_SLOT_SPLINE_NRM = 5,
+	TEX_SLOT_SPLINE_COL = 6,
+};
+
+
 // States transitions:
 // On creation: DRAWN_NEW
 // DRAWN_NEW -> DRAWN_HASHING
diff --git a/GPU/GLES/FramebufferManagerGLES.cpp b/GPU/GLES/FramebufferManagerGLES.cpp
index 7246c5654c..1211459f02 100644
--- a/GPU/GLES/FramebufferManagerGLES.cpp
+++ b/GPU/GLES/FramebufferManagerGLES.cpp
@@ -403,7 +403,7 @@ void FramebufferManagerGLES::MakePixelTexture(const u8 *srcPixels, GEBufferForma
 	render_->FinalizeTexture(drawPixelsTex_, 0, false);
 
 	// TODO: Return instead?
-	render_->BindTexture(0, drawPixelsTex_);
+	render_->BindTexture(TEX_SLOT_PSP_TEXTURE, drawPixelsTex_);
 }
 
 void FramebufferManagerGLES::SetViewport2D(int x, int y, int w, int h) {
diff --git a/GPU/GLES/StateMappingGLES.cpp b/GPU/GLES/StateMappingGLES.cpp
index 5a5fc1f071..ec256cd842 100644
--- a/GPU/GLES/StateMappingGLES.cpp
+++ b/GPU/GLES/StateMappingGLES.cpp
@@ -124,7 +124,7 @@ static const GLushort logicOps[] = {
 inline void DrawEngineGLES::ResetShaderBlending() {
 	if (fboTexBound_) {
 		GLRenderManager *renderManager = (GLRenderManager *)draw_->GetNativeObject(Draw::NativeObject::RENDER_MANAGER);
-		renderManager->BindTexture(1, nullptr);
+		renderManager->BindTexture(TEX_SLOT_SHADERBLEND_SRC, nullptr);
 		fboTexBound_ = false;
 	}
 }
@@ -331,7 +331,7 @@ void DrawEngineGLES::ApplyDrawStateLate(bool setStencil, int stencilValue) {
 	if (!gstate.isModeClear()) {
 		// Apply last, once we know the alpha params of the texture.
 		if (gstate.isAlphaTestEnabled() || gstate.isColorTestEnabled()) {
-			fragmentTestCache_->BindTestTexture(2);
+			fragmentTestCache_->BindTestTexture(TEX_SLOT_ALPHATEST);
 		}
 	}
 }
diff --git a/GPU/GLES/TextureCacheGLES.cpp b/GPU/GLES/TextureCacheGLES.cpp
index ae57b3b472..38d5aa280a 100644
--- a/GPU/GLES/TextureCacheGLES.cpp
+++ b/GPU/GLES/TextureCacheGLES.cpp
@@ -327,7 +327,7 @@ void TextureCacheGLES::BindTexture(TexCacheEntry *entry) {
 }
 
 void TextureCacheGLES::Unbind() {
-	render_->BindTexture(0, nullptr);
+	render_->BindTexture(TEX_SLOT_PSP_TEXTURE, nullptr);
 	InvalidateLastTexture();
 }
 
@@ -451,8 +451,8 @@ void TextureCacheGLES::ApplyTextureFramebuffer(TexCacheEntry *entry, VirtualFram
 		shaderApply.Use(render_, drawEngine_, shadeInputLayout_);
 
 		framebufferManagerGL_->BindFramebufferAsColorTexture(0, framebuffer, BINDFBCOLOR_SKIP_COPY);
-		render_->BindTexture(3, clutTexture);
-		render_->SetTextureSampler(3, GL_CLAMP_TO_EDGE, GL_CLAMP_TO_EDGE, GL_NEAREST, GL_NEAREST, 0.0f);
+		render_->BindTexture(TEX_SLOT_CLUT, clutTexture);
+		render_->SetTextureSampler(TEX_SLOT_CLUT, GL_CLAMP_TO_EDGE, GL_CLAMP_TO_EDGE, GL_NEAREST, GL_NEAREST, 0.0f);
 
 		shaderApply.Shade(render_);
 
@@ -662,7 +662,7 @@ void TextureCacheGLES::BuildTexture(TexCacheEntry *const entry) {
 
 	// This will rebind it, but that's okay.
 	// Need to actually bind it now - it might only have gotten bound in the init phase.
-	render_->BindTexture(0, entry->textureName);
+	render_->BindTexture(TEX_SLOT_PSP_TEXTURE, entry->textureName);
 	UpdateSamplingParams(*entry, true);
 }