diff --git a/library/modules/Materials.cpp b/library/modules/Materials.cpp
index e0337bf78..b7f9675f5 100644
--- a/library/modules/Materials.cpp
+++ b/library/modules/Materials.cpp
@@ -399,8 +399,8 @@ bool MaterialInfo::matches(const df::job_material_category &cat)
     TEST(plant, SEED_MAT);
     TEST(plant, THREAD_PLANT);
     TEST(plant, ALCOHOL_PLANT);
-	TEST(plant, POWDER_MISC_PLANT);
-	TEST(plant, LIQUID_MISC_PLANT);
+    TEST(plant, POWDER_MISC_PLANT);
+    TEST(plant, LIQUID_MISC_PLANT);
     TEST(wood, WOOD);
     TEST(cloth, THREAD_PLANT);
     TEST(silk, SILK);