diff --git a/makefiles/Makefile.csharp.mk b/makefiles/Makefile.csharp.mk
index 58e655dd02..dec3f21d4a 100755
--- a/makefiles/Makefile.csharp.mk
+++ b/makefiles/Makefile.csharp.mk
@@ -110,6 +110,8 @@ clean_csharp:
 $(GEN_DIR)/com/google/ortools/properties/GitVersion$(OR_TOOLS_VERSION).txt: $(GEN_DIR)/com/google/ortools/properties
 	@echo $(OR_TOOLS_VERSION) > $(GEN_DIR)$Scom$Sgoogle$Sortools$Sproperties$SGitVersion$(OR_TOOLS_VERSION).txt
 
+.PHONY: assembly_info common_assembly_info
+
 # See for background on Windows Explorer File Info Details:
 #  https://social.msdn.microsoft.com/Forums/vstudio/en-US/27894a09-1eed-48d9-8a0f-2198388d492c/csc-modulelink-or-just-csc-dll-plus-some-external-dllobj-references
 #  also, https://blogs.msdn.microsoft.com/texblog/2007/04/05/linking-native-c-into-c-applications/