diff --git a/src/Nazara/Shader/Ast/SanitizeVisitor.cpp b/src/Nazara/Shader/Ast/SanitizeVisitor.cpp
index 00be4ace0..32f6f4456 100644
--- a/src/Nazara/Shader/Ast/SanitizeVisitor.cpp
+++ b/src/Nazara/Shader/Ast/SanitizeVisitor.cpp
@@ -724,8 +724,6 @@ namespace Nz::ShaderAst
 		auto clone = static_unique_pointer_cast<DeclareExternalStatement>(AstCloner::Clone(node));
 		for (auto& extVar : clone->externalVars)
 		{
-			SanitizeIdentifier(extVar.name);
-
 			extVar.type = ResolveType(extVar.type);
 
 			ExpressionType varType;
@@ -739,6 +737,8 @@ namespace Nz::ShaderAst
 			std::size_t varIndex = RegisterVariable(extVar.name, std::move(varType));
 			if (!clone->varIndex)
 				clone->varIndex = varIndex; //< First external variable index is node variable index
+
+			SanitizeIdentifier(extVar.name);
 		}
 
 		return clone;
@@ -777,7 +777,6 @@ namespace Nz::ShaderAst
 		clone->parameters = node.parameters;
 		clone->returnType = ResolveType(node.returnType);
 
-		SanitizeIdentifier(clone->name);
 
 		Context::FunctionData tempFuncData;
 		tempFuncData.stageType = node.entryStage;
@@ -842,6 +841,8 @@ namespace Nz::ShaderAst
 			targetFunc.calledByFunctions.UnboundedSet(funcIndex);
 		}
 
+		SanitizeIdentifier(clone->name);
+
 		return clone;
 	}
 
diff --git a/src/Nazara/Shader/GlslWriter.cpp b/src/Nazara/Shader/GlslWriter.cpp
index 723feaf92..dcb4edd79 100644
--- a/src/Nazara/Shader/GlslWriter.cpp
+++ b/src/Nazara/Shader/GlslWriter.cpp
@@ -203,6 +203,8 @@ namespace Nz
 		options.reservedIdentifiers = {
 			// All reserved GLSL keywords as of GLSL ES 3.2
 			"active", "asm", "atomic_uint", "attribute", "bool", "break", "buffer", "bvec2", "bvec3", "bvec4", "case", "cast", "centroid", "class", "coherent", "common", "const", "continue", "default", "discard", "dmat2", "dmat2x2", "dmat2x3", "dmat2x4", "dmat3", "dmat3x2", "dmat3x3", "dmat3x4", "dmat4", "dmat4x2", "dmat4x3", "dmat4x4", "do", "double", "dvec2", "dvec3", "dvec4", "else", "enum", "extern", "external", "false", "filter", "fixed", "flat", "float", "for", "fvec2", "fvec3", "fvec4", "goto", "half", "highp", "hvec2", "hvec3", "hvec4", "if", "iimage1D", "iimage1DArray", "iimage2D", "iimage2DArray", "iimage2DMS", "iimage2DMSArray", "iimage2DRect", "iimage3D", "iimageBuffer", "iimageCube", "iimageCubeArray", "image1D", "image1DArray", "image2D", "image2DArray", "image2DMS", "image2DMSArray", "image2DRect", "image3D", "imageBuffer", "imageCube", "imageCubeArray", "in", "inline", "inout", "input", "int", "interface", "invariant", "isampler1D", "isampler1DArray", "isampler2D", "isampler2DArray", "isampler2DMS", "isampler2DMSArray", "isampler2DRect", "isampler3D", "isamplerBuffer", "isamplerCube", "isamplerCubeArray", "isubpassInput", "isubpassInputMS", "itexture2D", "itexture2DArray", "itexture2DMS", "itexture2DMSArray", "itexture3D", "itextureBuffer", "itextureCube", "itextureCubeArray", "ivec2", "ivec3", "ivec4", "layout", "long", "lowp", "mat2", "mat2x2", "mat2x3", "mat2x4", "mat3", "mat3x2", "mat3x3", "mat3x4", "mat4", "mat4x2", "mat4x3", "mat4x4", "mediump", "namespace", "noinline", "noperspective", "out", "output", "partition", "patch", "precise", "precision", "public", "readonly", "resource", "restrict", "return", "sample", "sampler", "sampler1D", "sampler1DArray", "sampler1DArrayShadow", "sampler1DShadow", "sampler2D", "sampler2DArray", "sampler2DArrayShadow", "sampler2DMS", "sampler2DMSArray", "sampler2DRect", "sampler2DRectShadow", "sampler2DShadow", "sampler3D", "sampler3DRect", "samplerBuffer", "samplerCube", "samplerCubeArray", "samplerCubeArrayShadow", "samplerCubeShadow", "samplerShadow", "shared", "short", "sizeof", "smooth", "static", "struct", "subpassInput", "subpassInputMS", "subroutine", "superp", "switch", "template", "texture2D", "texture2DArray", "texture2DMS", "texture2DMSArray", "texture3D", "textureBuffer", "textureCube", "textureCubeArray", "this", "true", "typedef", "uimage1D", "uimage1DArray", "uimage2D", "uimage2DArray", "uimage2DMS", "uimage2DMSArray", "uimage2DRect", "uimage3D", "uimageBuffer", "uimageCube", "uimageCubeArray", "uint", "uniform", "union", "unsigned", "usampler1D", "usampler1DArray", "usampler2D", "usampler2DArray", "usampler2DMS", "usampler2DMSArray", "usampler2DRect", "usampler3D", "usamplerBuffer", "usamplerCube", "usamplerCubeArray", "using", "usubpassInput", "usubpassInputMS", "utexture2D", "utexture2DArray", "utexture2DMS", "utexture2DMSArray", "utexture3D", "utextureBuffer", "utextureCube", "utextureCubeArray", "uvec2", "uvec3", "uvec4", "varying", "vec2", "vec3", "vec4", "void", "volatile", "while", "writeonly"
+			// GLSL functions
+			"cross", "dot", "length", "max", "min", "pow", "texture"
 		};
 
 		return ShaderAst::Sanitize(ast, options, error);