diff --git a/src/newgrf_analysis.cpp b/src/newgrf_analysis.cpp
index 64e0c624da..4847bed774 100644
--- a/src/newgrf_analysis.cpp
+++ b/src/newgrf_analysis.cpp
@@ -80,8 +80,7 @@ void DeterministicSpriteGroup::AnalyseCallbacks(AnalyseCallbackOperation &op) co
 
 	auto find_cb_result = [&](const SpriteGroup *group, AnalyseCallbackOperation::FindCBResultData data) -> bool {
 		if (group == nullptr) return false;
-		AnalyseCallbackOperation cbr_op;
-		cbr_op.mode = ACOM_FIND_CB_RESULT;
+		AnalyseCallbackOperation cbr_op(ACOM_FIND_CB_RESULT);
 		cbr_op.data.cb_result = data;
 		group->AnalyseCallbacks(cbr_op);
 		return (cbr_op.result_flags & ACORF_CB_RESULT_FOUND);
@@ -109,8 +108,7 @@ void DeterministicSpriteGroup::AnalyseCallbacks(AnalyseCallbackOperation &op) co
 
 							case CBID_VEHICLE_MODIFY_PROPERTY:
 								if (range.group != nullptr) {
-									AnalyseCallbackOperation cb36_op;
-									cb36_op.mode = ACOM_CB36_PROP;
+									AnalyseCallbackOperation cb36_op(ACOM_CB36_PROP);
 									range.group->AnalyseCallbacks(cb36_op);
 									op.properties_used |= cb36_op.properties_used;
 									op.callbacks_used |= cb36_op.callbacks_used;
@@ -120,8 +118,7 @@ void DeterministicSpriteGroup::AnalyseCallbacks(AnalyseCallbackOperation &op) co
 							case CBID_VEHICLE_REFIT_CAPACITY:
 								found_refit_cap = true;
 								if (range.group != nullptr) {
-									AnalyseCallbackOperation cb_refit_op;
-									cb_refit_op.mode = ACOM_CB_REFIT_CAPACITY;
+									AnalyseCallbackOperation cb_refit_op(ACOM_CB_REFIT_CAPACITY);
 									range.group->AnalyseCallbacks(cb_refit_op);
 									op.result_flags |= (cb_refit_op.result_flags & (ACORF_CB_REFIT_CAP_NON_WHITELIST_FOUND | ACORF_CB_REFIT_CAP_SEEN_VAR_47));
 								}
@@ -153,8 +150,7 @@ void DeterministicSpriteGroup::AnalyseCallbacks(AnalyseCallbackOperation &op) co
 								if (range.low == 0x9) {
 									/* Speed */
 									if (range.group != nullptr) {
-										AnalyseCallbackOperation cb36_speed;
-										cb36_speed.mode = ACOM_CB36_SPEED;
+										AnalyseCallbackOperation cb36_speed(ACOM_CB36_SPEED);
 										range.group->AnalyseCallbacks(cb36_speed);
 										op.callbacks_used |= cb36_speed.callbacks_used;
 									}
@@ -233,8 +229,7 @@ void DeterministicSpriteGroup::AnalyseCallbacks(AnalyseCallbackOperation &op) co
 							AnalyseCallbackOperationIndustryTileData data = *(op.data.indtile);
 							data.check_mask = new_check_mask;
 
-							AnalyseCallbackOperation sub_op;
-							sub_op.mode = ACOM_INDUSTRY_TILE;
+							AnalyseCallbackOperation sub_op(ACOM_INDUSTRY_TILE);
 							sub_op.data.indtile = &data;
 							range.group->AnalyseCallbacks(sub_op);
 
@@ -251,8 +246,7 @@ void DeterministicSpriteGroup::AnalyseCallbacks(AnalyseCallbackOperation &op) co
 					AnalyseCallbackOperationIndustryTileData data = *(op.data.indtile);
 					data.check_mask = default_mask;
 
-					AnalyseCallbackOperation sub_op;
-					sub_op.mode = ACOM_INDUSTRY_TILE;
+					AnalyseCallbackOperation sub_op(ACOM_INDUSTRY_TILE);
 					sub_op.data.indtile = &data;
 
 					this->default_group->AnalyseCallbacks(sub_op);
diff --git a/src/newgrf_analysis.h b/src/newgrf_analysis.h
index c455d7e8ca..4cb17df4f6 100644
--- a/src/newgrf_analysis.h
+++ b/src/newgrf_analysis.h
@@ -43,7 +43,7 @@ struct AnalyseCallbackOperation {
 	};
 
 	btree::btree_set<const SpriteGroup *> seen;
-	AnalyseCallbackOperationMode mode = ACOM_CB_VAR;
+	AnalyseCallbackOperationMode mode;
 	SpriteGroupCallbacksUsed callbacks_used = SGCU_NONE;
 	AnalyseCallbackOperationResultFlags result_flags = ACORF_NONE;
 	uint64 properties_used = 0;
@@ -51,6 +51,9 @@ struct AnalyseCallbackOperation {
 		FindCBResultData cb_result;
 		AnalyseCallbackOperationIndustryTileData *indtile;
 	} data;
+
+	AnalyseCallbackOperation(AnalyseCallbackOperationMode mode) :
+		mode(mode) {}
 };
 
 #endif /* NEWGRF_ANALYSIS_H */
diff --git a/src/newgrf_engine.cpp b/src/newgrf_engine.cpp
index 5a439e1626..8d9c9254a2 100644
--- a/src/newgrf_engine.cpp
+++ b/src/newgrf_engine.cpp
@@ -1602,7 +1602,7 @@ void AnalyseEngineCallbacks()
 		auto process_sg = [&](const SpriteGroup *sg, bool is_purchase) {
 			if (sg == nullptr) return;
 
-			AnalyseCallbackOperation op;
+			AnalyseCallbackOperation op(ACOM_CB_VAR);
 			sg->AnalyseCallbacks(op);
 			callbacks_used |= op.callbacks_used;
 			cb36_properties_used |= op.properties_used;
diff --git a/src/newgrf_industrytiles.cpp b/src/newgrf_industrytiles.cpp
index ac4e05b32d..21c633225d 100644
--- a/src/newgrf_industrytiles.cpp
+++ b/src/newgrf_industrytiles.cpp
@@ -444,8 +444,7 @@ void AnalyseIndustryTileSpriteGroups()
 				data.layout_index = idx + 1;
 				data.anim_state_at_offset = false;
 
-				AnalyseCallbackOperation op;
-				op.mode = ACOM_INDUSTRY_TILE;
+				AnalyseCallbackOperation op(ACOM_INDUSTRY_TILE);
 				op.data.indtile = &data;
 				tilespec.grf_prop.spritegroup[0]->AnalyseCallbacks(op);