1 files changed, 6 insertions, 0 deletions
diff --git a/src/glsl/glcpp/glcpp-lex.l b/src/glsl/glcpp/glcpp-lex.l
index cfb9f2a18be..0d4bfc8d443 100644
--- a/src/glsl/glcpp/glcpp-lex.l
+++ b/src/glsl/glcpp/glcpp-lex.l
@@ -259,6 +259,12 @@ HEXADECIMAL_INTEGER	0[xX][0-9a-fA-F]+[uU]?
 	return OBJ_IDENTIFIER;
 }
 
+<DEFINE>[^_a-zA-Z]{NONSPACE}* {
+	BEGIN INITIAL;
+	glcpp_error(yylloc, yyextra, "#define followed by a non-identifier: %s", yytext);
+	return INTEGER_STRING;
+}
+
 {HASH}undef {
 	yyextra->space_tokens = 0;
 	return HASH_UNDEF;