diff --git a/src/libsodium/randombytes/randombytes_salsa20_random.c b/src/libsodium/randombytes/randombytes_salsa20_random.c
index 063ee574..83d5aac7 100644
--- a/src/libsodium/randombytes/randombytes_salsa20_random.c
+++ b/src/libsodium/randombytes/randombytes_salsa20_random.c
@@ -6,6 +6,7 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
+#include <stdbool.h>
 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
@@ -38,7 +39,7 @@ typedef struct Salsa20Random_ {
     HCRYPTPROV    hcrypt_prov;
 #endif
     int           random_data_source_fd;
-    _Bool         initialized;
+    bool          initialized;
 } Salsa20Random;
 
 static Salsa20Random stream = {
diff --git a/src/libsodium/randombytes/randombytes_sysrandom.c b/src/libsodium/randombytes/randombytes_sysrandom.c
index dc7ab93c..1518d2cc 100644
--- a/src/libsodium/randombytes/randombytes_sysrandom.c
+++ b/src/libsodium/randombytes/randombytes_sysrandom.c
@@ -9,6 +9,7 @@
 #ifndef _WIN32
 # include <poll.h>
 #endif
+#include <stdbool.h>
 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
@@ -26,7 +27,7 @@ typedef struct SysRandom_ {
     HCRYPTPROV hcrypt_prov;
 #endif
     int        random_data_source_fd;
-    _Bool      initialized;
+    bool       initialized;
 } SysRandom;
 
 static SysRandom stream = {