diff --git a/Makefile b/Makefile
index e021e877..18073048 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,7 @@
+ifeq ($(OS),Windows_NT)
+$(error Windows is not supported)
+endif
+
 VERSION := 0.22.6
 
 # install directory layout
@@ -28,9 +32,7 @@ SONAME_MAJOR := $(word 1,$(subst ., ,$(VERSION)))
 SONAME_MINOR := $(word 2,$(subst ., ,$(VERSION)))
 
 # OS-specific bits
-ifeq ($(OS),Windows_NT)
-	$(error "Windows is not supported")
-else ifeq ($(shell uname),Darwin)
+ifeq ($(shell uname),Darwin)
 	SOEXT = dylib
 	SOEXTVER_MAJOR = $(SONAME_MAJOR).dylib
 	SOEXTVER = $(SONAME_MAJOR).$(SONAME_MINOR).dylib
diff --git a/cli/src/generate/templates/makefile b/cli/src/generate/templates/makefile
index 0492ec02..467bd2eb 100644
--- a/cli/src/generate/templates/makefile
+++ b/cli/src/generate/templates/makefile
@@ -1,3 +1,7 @@
+ifeq ($(OS),Windows_NT)
+$(error Windows is not supported)
+endif
+
 VERSION := 0.0.1
 
 LANGUAGE_NAME := tree-sitter-PARSER_NAME
@@ -37,9 +41,7 @@ ARFLAGS ?= rcs
 override CFLAGS += -I$(SRC_DIR) -std=c11 -fPIC
 
 # OS-specific bits
-ifeq ($(OS),Windows_NT)
-	$(error "Windows is not supported")
-else ifeq ($(shell uname),Darwin)
+ifeq ($(shell uname),Darwin)
 	SOEXT = dylib
 	SOEXTVER_MAJOR = $(SONAME_MAJOR).dylib
 	SOEXTVER = $(SONAME_MAJOR).$(SONAME_MINOR).dylib