diff --git a/src/librustdoc/json/conversions.rs b/src/librustdoc/json/conversions.rs
index dab23f8e42a3d..f446c9fbbd8b3 100644
--- a/src/librustdoc/json/conversions.rs
+++ b/src/librustdoc/json/conversions.rs
@@ -84,8 +84,8 @@ impl JsonRenderer<'_> {
                     let lo = span.lo(self.sess());
                     Some(Span {
                         filename: local_path,
-                        begin: (lo.line, lo.col.to_usize()),
-                        end: (hi.line, hi.col.to_usize()),
+                        begin: (lo.line, lo.col.to_usize() + 1),
+                        end: (hi.line, hi.col.to_usize() + 1),
                     })
                 } else {
                     None
diff --git a/src/rustdoc-json-types/lib.rs b/src/rustdoc-json-types/lib.rs
index 7247950545ad5..64223b5b75896 100644
--- a/src/rustdoc-json-types/lib.rs
+++ b/src/rustdoc-json-types/lib.rs
@@ -30,7 +30,7 @@ pub type FxHashMap<K, V> = HashMap<K, V>; // re-export for use in src/librustdoc
 /// This integer is incremented with every breaking change to the API,
 /// and is returned along with the JSON blob as [`Crate::format_version`].
 /// Consuming code should assert that this value matches the format version(s) that it supports.
-pub const FORMAT_VERSION: u32 = 44;
+pub const FORMAT_VERSION: u32 = 45;
 
 /// The root of the emitted JSON blob.
 ///
@@ -205,9 +205,9 @@ pub struct Item {
 pub struct Span {
     /// The path to the source file for this span relative to the path `rustdoc` was invoked with.
     pub filename: PathBuf,
-    /// Zero indexed Line and Column of the first character of the `Span`
+    /// One indexed Line and Column of the first character of the `Span`.
     pub begin: (usize, usize),
-    /// Zero indexed Line and Column of the last character of the `Span`
+    /// One indexed Line and Column of the last character of the `Span`.
     pub end: (usize, usize),
 }
 
diff --git a/tests/rustdoc-json/impls/auto.rs b/tests/rustdoc-json/impls/auto.rs
index f94f7338480bb..ce47d1be690f7 100644
--- a/tests/rustdoc-json/impls/auto.rs
+++ b/tests/rustdoc-json/impls/auto.rs
@@ -15,8 +15,8 @@ impl Foo {
 }
 
 // Testing spans, so all tests below code
-//@ is "$.index[?(@.docs=='has span')].span.begin" "[13, 0]"
-//@ is "$.index[?(@.docs=='has span')].span.end" "[15, 1]"
+//@ is "$.index[?(@.docs=='has span')].span.begin" "[13, 1]"
+//@ is "$.index[?(@.docs=='has span')].span.end" "[15, 2]"
 // FIXME: this doesn't work due to https://github.com/freestrings/jsonpath/issues/91
 // is "$.index[?(@.inner.impl.is_synthetic==true)].span" null
 pub struct Foo;
diff --git a/tests/rustdoc-json/span.rs b/tests/rustdoc-json/span.rs
new file mode 100644
index 0000000000000..c96879d0e684a
--- /dev/null
+++ b/tests/rustdoc-json/span.rs
@@ -0,0 +1,4 @@
+pub mod bar {}
+// This test ensures that spans are 1-indexed.
+//@ is "$.index[?(@.name=='span')].span.begin" "[1, 1]"
+//@ is "$.index[?(@.name=='bar')].span.begin" "[1, 1]"