diff --git a/CHANGELOG.md b/CHANGELOG.md
index b554fd0270044055b07572dc477acd4bafe700f2..187b88bd7f4648e6784679b41e318bb9f3577b78 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 ## 0.1.6
 
+- fix: crash when printing unused struct declaration error
+
 ## 0.1.5
 
 - feat: clarify "defined runtime representation" and "can be represented at runtime"
diff --git a/src/core/Ast.zig b/src/core/Ast.zig
index 788346e7ec2f57c55194232e3a3d420e0127313a..b4434183b72c4755c28a6e08f5a36daf41e43dec 100644
--- a/src/core/Ast.zig
+++ b/src/core/Ast.zig
@@ -717,6 +717,7 @@ pub fn idToken(ast: Ast, node: NodeIndex) TokenIndex {
         => ast.nodeToken(node),
         .fn_decl,
         .var_decl,
+        .struct_decl,
         => ast.nodeToken(node) + 1,
         else => unreachable, // does not have an id
     };
diff --git a/src/core/Report.zig b/src/core/Report.zig
index 18fc277abcce5dd1e39f0ea8cf9aab2f7a264ff5..69689da1a87eb35acc66c70dcfe8b902faf15ab9 100644
--- a/src/core/Report.zig
+++ b/src/core/Report.zig
@@ -436,6 +436,7 @@ pub const Warn = union(enum) {
                 .param_decl => ctx.ast.fullParamDecl(data.node).id,
                 .fn_decl => ctx.ast.fullFnDecl(data.node).id,
                 .var_decl => ctx.ast.fullVarDecl(data.node).id,
+                .struct_decl => ctx.ast.fullStructDecl(data.node).id,
                 else => unreachable, // not a valid symbol node
             };
 
@@ -538,7 +539,7 @@ pub const UnusedKind = enum {
     param,
     constant,
     variable,
-    function,
+    declaration,
 };
 
 pub const String = struct {
diff --git a/src/core/Transform.zig b/src/core/Transform.zig
index 0c2a57a99f641bf0d020b2fb6ad6304492193372..64e88f321ae0557681f065b77c091f2eba72d152 100644
--- a/src/core/Transform.zig
+++ b/src/core/Transform.zig
@@ -271,7 +271,7 @@ const Scope = struct {
                 try t.report.warn(.unused, .{
                     .node = symbol.node,
                     .kind = switch (symbol.data) {
-                        .declaration => .function,
+                        .declaration => .declaration,
                         .param => .param,
                         .mutable => .variable,
                         .immutable => switch (t.ast.nodeTag(symbol.node)) {
@@ -1484,7 +1484,7 @@ fn transformAssignmentTarget(
                         .decl = lookup.node,
                         .kind = switch (lookup.data) {
                             .mutable => unreachable,
-                            .declaration => .function,
+                            .declaration => .declaration,
                             .param => .param,
                             .immutable => switch (t.ast.nodeTag(lookup.node)) {
                                 .param_decl => .param,