diff --git a/core/Makefile b/core/Makefile
index c862e97c7..af03c2e44 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -1714,7 +1714,8 @@ $(if $(filter true,$(BOARD_USES_RECOVERY_AS_BOOT)),\
 $(if $(filter true,$(BOARD_BUILD_SYSTEM_ROOT_IMAGE)),\
     $(hide) echo "system_root_image=true" >> $(1))
 $(hide) echo "root_dir=$(TARGET_ROOT_OUT)" >> $(1)
-$(if $(PRODUCT_USE_DYNAMIC_PARTITION_SIZE),$(hide) echo "use_dynamic_partition_size=true" >> $(1))
+$(if $(filter true,$(PRODUCT_USE_DYNAMIC_PARTITION_SIZE)),\
+    $(hide) echo "use_dynamic_partition_size=true" >> $(1))
 $(if $(3),$(hide) $(foreach kv,$(3),echo "$(kv)" >> $(1);))
 endef