diff --git a/src/compiler/glsl/glcpp/glcpp-lex.l b/src/compiler/glsl/glcpp/glcpp-lex.l
index fa9aa506912..071918e5692 100644
--- a/src/compiler/glsl/glcpp/glcpp-lex.l
+++ b/src/compiler/glsl/glcpp/glcpp-lex.l
@@ -120,6 +120,11 @@ void glcpp_set_column (int  column_no , yyscan_t yyscanner);
 static int
 glcpp_lex_update_state_per_token (glcpp_parser_t *parser, int token)
 {
+	if (token != NEWLINE && token != SPACE && token != HASH_TOKEN &&
+	    !parser->lexing_version_directive) {
+		glcpp_parser_resolve_implicit_version(parser);
+	}
+
 	/* After the first non-space token in a line, we won't
 	 * allow any '#' to introduce a directive. */
 	if (token == NEWLINE) {
@@ -285,6 +290,7 @@ HEXADECIMAL_INTEGER	0[xX][0-9a-fA-F]+[uU]?
 <HASH>version{HSPACE}+ {
 	BEGIN INITIAL;
 	yyextra->space_tokens = 0;
+	yyextra->lexing_version_directive = 1;
 	RETURN_STRING_TOKEN (VERSION_TOKEN);
 }
 
@@ -536,6 +542,7 @@ HEXADECIMAL_INTEGER	0[xX][0-9a-fA-F]+[uU]?
 	}
 	yyextra->space_tokens = 1;
 	yyextra->lexing_directive = 0;
+	yyextra->lexing_version_directive = 0;
 	yylineno++;
 	yycolumn = 0;
 	RETURN_TOKEN_NEVER_SKIP (NEWLINE);
@@ -546,6 +553,7 @@ HEXADECIMAL_INTEGER	0[xX][0-9a-fA-F]+[uU]?
 		glcpp_error(yylloc, yyextra, "Unterminated comment");
 	BEGIN DONE; /* Don't keep matching this rule forever. */
 	yyextra->lexing_directive = 0;
+	yyextra->lexing_version_directive = 0;
 	if (! parser->last_token_was_newline)
 		RETURN_TOKEN (NEWLINE);
 }
diff --git a/src/compiler/glsl/glcpp/glcpp.h b/src/compiler/glsl/glcpp/glcpp.h
index 70aa14b6ec0..d87e6b77dc5 100644
--- a/src/compiler/glsl/glcpp/glcpp.h
+++ b/src/compiler/glsl/glcpp/glcpp.h
@@ -176,6 +176,7 @@ struct glcpp_parser {
 	struct hash_table *defines;
 	active_list_t *active;
 	int lexing_directive;
+	int lexing_version_directive;
 	int space_tokens;
 	int last_token_was_newline;
 	int last_token_was_space;
diff --git a/src/compiler/glsl/glcpp/tests/144-implicit-version.c b/src/compiler/glsl/glcpp/tests/144-implicit-version.c
new file mode 100644
index 00000000000..7bf72fc19e9
--- /dev/null
+++ b/src/compiler/glsl/glcpp/tests/144-implicit-version.c
@@ -0,0 +1 @@
+int x = __VERSION__;
diff --git a/src/compiler/glsl/glcpp/tests/144-implicit-version.c.expected b/src/compiler/glsl/glcpp/tests/144-implicit-version.c.expected
new file mode 100644
index 00000000000..8c2dfd9ce30
--- /dev/null
+++ b/src/compiler/glsl/glcpp/tests/144-implicit-version.c.expected
@@ -0,0 +1 @@
+int x = 110;
diff --git a/src/compiler/glsl/glcpp/tests/145-version-first.c b/src/compiler/glsl/glcpp/tests/145-version-first.c
new file mode 100644
index 00000000000..f9fcfb08246
--- /dev/null
+++ b/src/compiler/glsl/glcpp/tests/145-version-first.c
@@ -0,0 +1,2 @@
+123
+#version 120
diff --git a/src/compiler/glsl/glcpp/tests/145-version-first.c.expected b/src/compiler/glsl/glcpp/tests/145-version-first.c.expected
new file mode 100644
index 00000000000..f4092b04af7
--- /dev/null
+++ b/src/compiler/glsl/glcpp/tests/145-version-first.c.expected
@@ -0,0 +1,3 @@
+0:2(1): preprocessor error: #version must appear on the first line
+123
+
diff --git a/src/compiler/glsl/glcpp/tests/146-version-first-hash.c b/src/compiler/glsl/glcpp/tests/146-version-first-hash.c
new file mode 100644
index 00000000000..14dbe964bd6
--- /dev/null
+++ b/src/compiler/glsl/glcpp/tests/146-version-first-hash.c
@@ -0,0 +1,2 @@
+#
+#version 120
diff --git a/src/compiler/glsl/glcpp/tests/146-version-first-hash.c.expected b/src/compiler/glsl/glcpp/tests/146-version-first-hash.c.expected
new file mode 100644
index 00000000000..2872090333d
--- /dev/null
+++ b/src/compiler/glsl/glcpp/tests/146-version-first-hash.c.expected
@@ -0,0 +1,3 @@
+0:1(3): preprocessor error: #version must appear on the first line
+
+