diff --git a/makefiles/Makefile.cpp.mk b/makefiles/Makefile.cpp.mk
index a1a6d66a96..913f3d76a9 100644
--- a/makefiles/Makefile.cpp.mk
+++ b/makefiles/Makefile.cpp.mk
@@ -341,6 +341,7 @@ clean_cc:
 	-$(DEL) $(LIB_DIR)$S$(LIBPREFIX)shortestpaths.$(STATIC_LIB_SUFFIX)
 	-$(DEL) $(LIB_DIR)$S$(LIBPREFIX)old_fz.$(STATIC_LIB_SUFFIX)
 	-$(DEL) $(LIB_DIR)$S$(LIBPREFIX)fz.$(STATIC_LIB_SUFFIX)
+	-$(DEL) $(LIB_DIR)$S$(LIBPREFIX)fz2.$(STATIC_LIB_SUFFIX)
 	-$(DEL) $(LIB_DIR)$S$(LIBPREFIX)sat.$(STATIC_LIB_SUFFIX)
 	-$(DEL) $(OBJ_DIR)$S*.$O
 	-$(DEL) $(OBJ_DIR)$Salgorithms$S*.$O
diff --git a/makefiles/Makefile.csharp.mk b/makefiles/Makefile.csharp.mk
index 3149e6661f..26a06ac548 100644
--- a/makefiles/Makefile.csharp.mk
+++ b/makefiles/Makefile.csharp.mk
@@ -42,7 +42,7 @@ csharp: csharportools csharpexe
 
 # Clean target.
 clean_csharp:
-	-$(DEL) $(LIB_DIR)$S$(LIBPREFIX)Google.OrTools.*.$(DYNAMIC_SWIG_LIB_SUFFIX)
+	-$(DEL) $(LIB_DIR)$S$(LIBPREFIX)Google.OrTools.$(DYNAMIC_SWIG_LIB_SUFFIX)
 	-$(DEL) $(BIN_DIR)$SGoogle.OrTools*.dll
 	-$(DEL) $(BIN_DIR)$SGoogle.OrTools*.mdb
 	-$(DEL) $(LIB_DIR)$S$(LIBPREFIX)Google.OrTools*.lib