diff --git a/src/librustc_error_codes/error_codes.rs b/src/librustc_error_codes/error_codes.rs
index 00c072e1b04a1..f687221d78e03 100644
--- a/src/librustc_error_codes/error_codes.rs
+++ b/src/librustc_error_codes/error_codes.rs
@@ -449,6 +449,7 @@ E0764: include_str!("./error_codes/E0764.md"),
 E0765: include_str!("./error_codes/E0765.md"),
 E0766: include_str!("./error_codes/E0766.md"),
 E0767: include_str!("./error_codes/E0767.md"),
+E0768: include_str!("./error_codes/E0768.md"),
 ;
 //  E0006, // merged with E0005
 //  E0008, // cannot bind by-move into a pattern guard
diff --git a/src/librustc_error_codes/error_codes/E0768.md b/src/librustc_error_codes/error_codes/E0768.md
new file mode 100644
index 0000000000000..24169ef512efb
--- /dev/null
+++ b/src/librustc_error_codes/error_codes/E0768.md
@@ -0,0 +1,13 @@
+A number in a non-decimal base has no digits.
+
+Erroneous code example:
+
+```compile_fail,E0768
+let s: i32 = 0b; // error!
+```
+
+To fix this error, add the missing digits:
+
+```
+let s: i32 = 0b1; // ok!
+```
diff --git a/src/librustc_parse/lexer/mod.rs b/src/librustc_parse/lexer/mod.rs
index 5050f03bea9b2..2b0e637c74e5a 100644
--- a/src/librustc_parse/lexer/mod.rs
+++ b/src/librustc_parse/lexer/mod.rs
@@ -391,7 +391,14 @@ impl<'a> StringReader<'a> {
             }
             rustc_lexer::LiteralKind::Int { base, empty_int } => {
                 return if empty_int {
-                    self.err_span_(start, suffix_start, "no valid digits found for number");
+                    self.sess
+                        .span_diagnostic
+                        .struct_span_err_with_code(
+                            self.mk_sp(start, suffix_start),
+                            "no valid digits found for number",
+                            error_code!(E0768),
+                        )
+                        .emit();
                     (token::Integer, sym::integer(0))
                 } else {
                     self.validate_int_literal(base, start, suffix_start);
diff --git a/src/test/ui/parser/issue-1802-1.stderr b/src/test/ui/parser/issue-1802-1.stderr
index b7d003df56b71..954cc0beeef3e 100644
--- a/src/test/ui/parser/issue-1802-1.stderr
+++ b/src/test/ui/parser/issue-1802-1.stderr
@@ -1,4 +1,4 @@
-error: no valid digits found for number
+error[E0768]: no valid digits found for number
   --> $DIR/issue-1802-1.rs:5:16
    |
 LL |     log(error, 0b);
@@ -6,3 +6,4 @@ LL |     log(error, 0b);
 
 error: aborting due to previous error
 
+For more information about this error, try `rustc --explain E0768`.
diff --git a/src/test/ui/parser/issue-1802-2.stderr b/src/test/ui/parser/issue-1802-2.stderr
index 8491dd07cb788..49043d07b35eb 100644
--- a/src/test/ui/parser/issue-1802-2.stderr
+++ b/src/test/ui/parser/issue-1802-2.stderr
@@ -1,4 +1,4 @@
-error: no valid digits found for number
+error[E0768]: no valid digits found for number
   --> $DIR/issue-1802-2.rs:5:16
    |
 LL |     log(error, 0b);
@@ -6,3 +6,4 @@ LL |     log(error, 0b);
 
 error: aborting due to previous error
 
+For more information about this error, try `rustc --explain E0768`.
diff --git a/src/test/ui/parser/lex-bad-numeric-literals.stderr b/src/test/ui/parser/lex-bad-numeric-literals.stderr
index 151480dd012a3..f05d61603023c 100644
--- a/src/test/ui/parser/lex-bad-numeric-literals.stderr
+++ b/src/test/ui/parser/lex-bad-numeric-literals.stderr
@@ -46,7 +46,7 @@ error: hexadecimal float literal is not supported
 LL |     0x9.0e-9;
    |     ^^^^^^^^
 
-error: no valid digits found for number
+error[E0768]: no valid digits found for number
   --> $DIR/lex-bad-numeric-literals.rs:11:5
    |
 LL |     0o;
@@ -64,31 +64,31 @@ error: hexadecimal float literal is not supported
 LL |     0x539.0;
    |     ^^^^^^^
 
-error: no valid digits found for number
+error[E0768]: no valid digits found for number
   --> $DIR/lex-bad-numeric-literals.rs:18:5
    |
 LL |     0x;
    |     ^^
 
-error: no valid digits found for number
+error[E0768]: no valid digits found for number
   --> $DIR/lex-bad-numeric-literals.rs:19:5
    |
 LL |     0xu32;
    |     ^^
 
-error: no valid digits found for number
+error[E0768]: no valid digits found for number
   --> $DIR/lex-bad-numeric-literals.rs:20:5
    |
 LL |     0ou32;
    |     ^^
 
-error: no valid digits found for number
+error[E0768]: no valid digits found for number
   --> $DIR/lex-bad-numeric-literals.rs:21:5
    |
 LL |     0bu32;
    |     ^^
 
-error: no valid digits found for number
+error[E0768]: no valid digits found for number
   --> $DIR/lex-bad-numeric-literals.rs:22:5
    |
 LL |     0b;
@@ -138,3 +138,4 @@ LL |     0b101f64;
 
 error: aborting due to 23 previous errors
 
+For more information about this error, try `rustc --explain E0768`.