diff --git a/ext/standard/crypt_sha256.c b/ext/standard/crypt_sha256.c
index 7e632de9f7b..ea7883ab06b 100644
--- a/ext/standard/crypt_sha256.c
+++ b/ext/standard/crypt_sha256.c
@@ -12,7 +12,6 @@
 
 #ifdef PHP_WIN32
 # include "win32/php_stdint.h"
-# include "win32/php_stdbool.h"
 # define __alignof__ __alignof
 # define alloca _alloca
 #else
@@ -21,7 +20,6 @@
 # elif HAVE_STDINT_H
 #  include <stdint.h>
 # endif
-# include <stdbool.h>
 #endif
 
 #include <stdio.h>
@@ -364,7 +362,7 @@ char * php_sha256_crypt_r(const char *key, const char *salt, char *buffer, int b
 	char *s_bytes;
 	/* Default number of rounds.  */
 	size_t rounds = ROUNDS_DEFAULT;
-	bool rounds_custom = false;
+	zend_bool rounds_custom = 0;
 
 	/* Find beginning of salt string.  The prefix should normally always
 	be present.  Just in case it is not.  */
@@ -380,7 +378,7 @@ char * php_sha256_crypt_r(const char *key, const char *salt, char *buffer, int b
 		if (*endp == '$') {
 			salt = endp + 1;
 			rounds = MAX(ROUNDS_MIN, MIN(srounds, ROUNDS_MAX));
-			rounds_custom = true;
+			rounds_custom = 1;
 		}
 	}
 
diff --git a/ext/standard/crypt_sha512.c b/ext/standard/crypt_sha512.c
index f339dbb8103..22f7e7fa792 100644
--- a/ext/standard/crypt_sha512.c
+++ b/ext/standard/crypt_sha512.c
@@ -11,7 +11,6 @@
 #include <limits.h>
 #ifdef PHP_WIN32
 # include "win32/php_stdint.h"
-# include "win32/php_stdbool.h"
 # define __alignof__ __alignof
 # define alloca _alloca
 #else
@@ -20,7 +19,6 @@
 # elif HAVE_STDINT_H
 #  include <stdint.h>
 # endif
-# include <stdbool.h>
 #endif
 
 #include <stdio.h>
@@ -391,7 +389,7 @@ php_sha512_crypt_r(const char *key, const char *salt, char *buffer, int buflen)
 	char *s_bytes;
 	/* Default number of rounds.  */
 	size_t rounds = ROUNDS_DEFAULT;
-	bool rounds_custom = false;
+	zend_bool rounds_custom = 0;
 
 	/* Find beginning of salt string.  The prefix should normally always
 	 be present.  Just in case it is not.  */
@@ -408,7 +406,7 @@ php_sha512_crypt_r(const char *key, const char *salt, char *buffer, int buflen)
 		if (*endp == '$') {
 			salt = endp + 1;
 			rounds = MAX(ROUNDS_MIN, MIN(srounds, ROUNDS_MAX));
-			rounds_custom = true;
+			rounds_custom = 1;
 		}
 	}