diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 2a6e8c2..3ec0865 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -58,4 +58,5 @@ jobs:
           nmake /NOLOGO /F Makefile.win install
           nmake /NOLOGO /F Makefile.win installcheck
           nmake /NOLOGO /F Makefile.win clean
+          nmake /NOLOGO /F Makefile.win uninstall
         shell: cmd
diff --git a/Makefile.win b/Makefile.win
index 7bbdf9d..b242602 100644
--- a/Makefile.win
+++ b/Makefile.win
@@ -55,6 +55,11 @@ install:
 installcheck:
 	"$(BINDIR)\pg_regress" --bindir="$(BINDIR)" $(REGRESS_OPTS) $(REGRESS)
 
+uninstall:
+	rm -f "$(PKGLIBDIR)\$(SHLIB)"
+	rm -f "$(SHAREDIR)\extension\$(EXTENSION).control"
+	rm -f "$(SHAREDIR)\extension\vector--*.sql"
+
 clean:
 	rm -f $(SHLIB) $(EXTENSION).lib $(EXTENSION).exp
 	rm -f $(OBJS)