diff --git a/src/libsodium/crypto_secretbox/crypto_secretbox_easy.c b/src/libsodium/crypto_secretbox/crypto_secretbox_easy.c
index 082aaec5..e4e7c72d 100644
--- a/src/libsodium/crypto_secretbox/crypto_secretbox_easy.c
+++ b/src/libsodium/crypto_secretbox/crypto_secretbox_easy.c
@@ -26,9 +26,9 @@ crypto_secretbox_detached(unsigned char *c, unsigned char *mac,
 
     crypto_core_hsalsa20(subkey, n, k, NULL);
 
-    if (((uintptr_t) c >= (uintptr_t) m &&
+    if (((uintptr_t) c > (uintptr_t) m &&
          (uintptr_t) c - (uintptr_t) m < mlen) ||
-        ((uintptr_t) m >= (uintptr_t) c &&
+        ((uintptr_t) m > (uintptr_t) c &&
          (uintptr_t) m - (uintptr_t) c < mlen)) {
         memmove(c, m, mlen);
         m = c;
diff --git a/src/libsodium/crypto_secretbox/xchacha20poly1305/secretbox_xchacha20poly1305.c b/src/libsodium/crypto_secretbox/xchacha20poly1305/secretbox_xchacha20poly1305.c
index 47852457..f7f6a4ea 100644
--- a/src/libsodium/crypto_secretbox/xchacha20poly1305/secretbox_xchacha20poly1305.c
+++ b/src/libsodium/crypto_secretbox/xchacha20poly1305/secretbox_xchacha20poly1305.c
@@ -30,9 +30,9 @@ crypto_secretbox_xchacha20poly1305_detached(unsigned char *c,
 
     crypto_core_hchacha20(subkey, n, k, NULL);
 
-    if (((uintptr_t) c >= (uintptr_t) m &&
+    if (((uintptr_t) c > (uintptr_t) m &&
          (uintptr_t) c - (uintptr_t) m < mlen) ||
-        ((uintptr_t) m >= (uintptr_t) c &&
+        ((uintptr_t) m > (uintptr_t) c &&
          (uintptr_t) m - (uintptr_t) c < mlen)) {
         memmove(c, m, mlen);
         m = c;