diff --git a/parser-stmt-asm.c b/parser-stmt-asm.c
index 18082966..04a1fc8b 100644
--- a/parser-stmt-asm.c
+++ b/parser-stmt-asm.c
@@ -157,6 +157,7 @@ parser_asm(struct parser *pr, struct doc *dc, struct doc **out)
 	struct token *qualifier = NULL;
 	struct token *assembly, *lparen, *rparen;
 	int ninputs = 0;
+	int noutputs = 0;
 	int error;
 
 	if (!lexer_peek_if(lx, TOKEN_ASSEMBLY, NULL))
@@ -213,12 +214,14 @@ parser_asm(struct parser *pr, struct doc *dc, struct doc **out)
 		parser_doc_token(pr, colon, concat);
 		concat = doc_indent(2, concat);
 		while (parser_stmt_asm_operand(pr, concat) & GOOD)
-			continue;
+			noutputs++;
 	}
 
 	/* clobbers */
 	if (lexer_if(lx, TOKEN_COLON, &colon)) {
 		concat = doc_alloc(DOC_CONCAT, doc_alloc(DOC_GROUP, opt));
+		if (noutputs > 0)
+			doc_alloc(DOC_LINE, concat);
 		parser_doc_token(pr, colon, concat);
 		if (!lexer_peek_if(lx, TOKEN_RPAREN, NULL))
 			doc_alloc(DOC_LINE, concat);
diff --git a/tests/valid-394.c b/tests/valid-394.c
new file mode 100644
index 00000000..28f68e83
--- /dev/null
+++ b/tests/valid-394.c
@@ -0,0 +1,9 @@
+/*
+ * Inline assembler.
+ */
+
+int
+main(void)
+{
+	asm("cpuid" : "+c" (c), "+d" (d) : "a" (1), "c" (0) : "ebx");
+}