diff --git a/packages/babylon/src/tokenizer/index.js b/packages/babylon/src/tokenizer/index.js
index 8b40220364..7bff031091 100644
--- a/packages/babylon/src/tokenizer/index.js
+++ b/packages/babylon/src/tokenizer/index.js
@@ -786,7 +786,7 @@ export default class Tokenizer {
       return lineBreak.test(this.input.slice(this.state.lastTokEnd, this.state.start));
     }
 
-    if (prevType === tt._else || prevType === tt.semi || prevType === tt.eof) {
+    if (prevType === tt._else || prevType === tt.semi || prevType === tt.eof || prevType === tt.parenR) {
       return true;
     }
 
diff --git a/packages/babylon/test/fixtures/core/categorized/regex-after-block/actual.js b/packages/babylon/test/fixtures/core/categorized/regex-after-block/actual.js
new file mode 100644
index 0000000000..eaf38a64b8
--- /dev/null
+++ b/packages/babylon/test/fixtures/core/categorized/regex-after-block/actual.js
@@ -0,0 +1,4 @@
+if (true) {
+}
+
+/foo/
\ No newline at end of file
diff --git a/packages/babylon/test/fixtures/core/categorized/regex-after-block/expected.json b/packages/babylon/test/fixtures/core/categorized/regex-after-block/expected.json
new file mode 100644
index 0000000000..baf001440d
--- /dev/null
+++ b/packages/babylon/test/fixtures/core/categorized/regex-after-block/expected.json
@@ -0,0 +1,120 @@
+{
+  "type": "File",
+  "start": 0,
+  "end": 20,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 4,
+      "column": 5
+    }
+  },
+  "program": {
+    "type": "Program",
+    "start": 0,
+    "end": 20,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 4,
+        "column": 5
+      }
+    },
+    "sourceType": "script",
+    "body": [
+      {
+        "type": "IfStatement",
+        "start": 0,
+        "end": 13,
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 0
+          },
+          "end": {
+            "line": 2,
+            "column": 1
+          }
+        },
+        "test": {
+          "type": "Literal",
+          "start": 4,
+          "end": 8,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 4
+            },
+            "end": {
+              "line": 1,
+              "column": 8
+            }
+          },
+          "value": true,
+          "rawValue": true,
+          "raw": "true"
+        },
+        "consequent": {
+          "type": "BlockStatement",
+          "start": 10,
+          "end": 13,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 10
+            },
+            "end": {
+              "line": 2,
+              "column": 1
+            }
+          },
+          "body": []
+        },
+        "alternate": null
+      },
+      {
+        "type": "ExpressionStatement",
+        "start": 15,
+        "end": 20,
+        "loc": {
+          "start": {
+            "line": 4,
+            "column": 0
+          },
+          "end": {
+            "line": 4,
+            "column": 5
+          }
+        },
+        "expression": {
+          "type": "Literal",
+          "start": 15,
+          "end": 20,
+          "loc": {
+            "start": {
+              "line": 4,
+              "column": 0
+            },
+            "end": {
+              "line": 4,
+              "column": 5
+            }
+          },
+          "value": {},
+          "rawValue": {},
+          "raw": "/foo/",
+          "regex": {
+            "pattern": "foo",
+            "flags": ""
+          }
+        }
+      }
+    ]
+  }
+}
\ No newline at end of file