diff --git a/internal/lsp/source/hover.go b/internal/lsp/source/hover.go
index 10fb541..f7fb3cb 100644
--- a/internal/lsp/source/hover.go
+++ b/internal/lsp/source/hover.go
@@ -341,7 +341,9 @@
 			tok2 := s.FileSet().File(node.Pos())
 			var spec ast.Spec
 			for _, s := range node.Specs {
-				if tok2.Offset(s.Pos()) <= offset && offset <= tok2.Offset(s.End()) {
+				// Avoid panics by guarding the calls to token.Offset (golang/go#48249).
+				// TODO(rstambler): Investigate this further and adjust if needed.
+				if InRange(tok2, s.Pos()) && InRange(tok2, s.End()) && tok2.Offset(s.Pos()) <= offset && offset <= tok2.Offset(s.End()) {
 					spec = s
 					break
 				}