diff --git a/src/analyze.cpp b/src/analyze.cpp
index 27bda281c3..30fa52ef86 100644
--- a/src/analyze.cpp
+++ b/src/analyze.cpp
@@ -3627,22 +3627,25 @@ static TypeTableEntry *analyze_prefix_op_expr(CodeGen *g, ImportTableEntry *impo
                         expr_node);
                 if (expr_type->id == TypeTableEntryIdInvalid) {
                     return expr_type;
-                } else if (expr_type->id == TypeTableEntryIdInt &&
-                        expr_type->data.integral.is_signed)
+                } else if ((expr_type->id == TypeTableEntryIdInt &&
+                            expr_type->data.integral.is_signed) ||
+                            expr_type->id == TypeTableEntryIdFloat ||
+                            expr_type->id == TypeTableEntryIdNumLitInt ||
+                            expr_type->id == TypeTableEntryIdNumLitFloat)
                 {
-                    return expr_type;
-                } else if (expr_type->id == TypeTableEntryIdFloat) {
-                    return expr_type;
-                } else if (expr_type->id == TypeTableEntryIdNumLitInt) {
-                    return expr_type;
-                } else if (expr_type->id == TypeTableEntryIdNumLitFloat) {
+                    ConstExprValue *target_const_val = &get_resolved_expr(expr_node)->const_val;
+                    if (!target_const_val->ok) {
+                        return expr_type;
+                    }
+                    ConstExprValue *const_val = &get_resolved_expr(node)->const_val;
+                    const_val->ok = true;
+                    bignum_negate(&const_val->data.x_bignum, &target_const_val->data.x_bignum);
                     return expr_type;
                 } else {
                     add_node_error(g, node, buf_sprintf("invalid negation type: '%s'",
                             buf_ptr(&expr_type->name)));
                     return g->builtin_types.entry_invalid;
                 }
-                // TODO const expr eval
             }
         case PrefixOpAddressOf:
         case PrefixOpConstAddressOf:
diff --git a/test/run_tests.cpp b/test/run_tests.cpp
index d02ffbecae..daf3fa4cc9 100644
--- a/test/run_tests.cpp
+++ b/test/run_tests.cpp
@@ -1286,6 +1286,28 @@ pub fn main(args: [][]u8) -> %void {
     %%stdout.printf("OK" ++ " IT " ++ "WORKED\n");
 }
     )SOURCE", "OK IT WORKED\n");
+
+    add_simple_case("constant struct with negation", R"SOURCE(
+import "std.zig";
+struct Vertex {
+    x: f32,
+    y: f32,
+    r: f32,
+    g: f32,
+    b: f32,
+}
+const vertices = []Vertex {
+    Vertex { .x = -0.6, .y = -0.4, .r = 1.0, .g = 0.0, .b = 0.0 },
+    Vertex { .x =  0.6, .y = -0.4, .r = 0.0, .g = 1.0, .b = 0.0 },
+    Vertex { .x =  0.0, .y =  0.6, .r = 0.0, .g = 0.0, .b = 1.0 },
+};
+pub fn main(args: [][]u8) -> %void {
+    if (vertices[0].x != -0.6) {
+        %%stdout.printf("BAD\n");
+    }
+    %%stdout.printf("OK\n");
+}
+    )SOURCE", "OK\n");
 }