diff --git a/Makefile.win b/Makefile.win
index 408bbd1..65ec8af 100644
--- a/Makefile.win
+++ b/Makefile.win
@@ -45,7 +45,7 @@ PAM_CHECK = $(shell echo "\#include <security/pam_appl.h>\\n int main(){return 0
 ifeq ($(PAM_CHECK), true)
     PLUGINS += PamAuth
 endif
-PCRE_CHECK = $(shell echo "\#define PCRE2_CODE_UNIT_WIDTH 8\\n#include <pcre2.h>\\n int main(){return 0;}" | tr -d '\\' | cc -x c $(CFLAGS) $(LDFLAGS) -l pcre2-8 -o testpcre - 2>/dev/null && rm testpcre && echo true||echo false)
+PCRE_CHECK = $(shell echo "\#define PCRE2_CODE_UNIT_WIDTH 8\\n#include <pcre2.h>\\n int main(){return 0;}" | tr -d '\\\\' | cc -x c $(CFLAGS) $(LDFLAGS) -l pcre2-8 -o testpcre - 2>/dev/null && rm testpcre && echo true||echo false)
 ifeq ($(PCRE_CHECK), true)
     PLUGINS += PCREPlugin
 endif