diff --git a/libs/libc/include/errno.h b/libs/libc/include/errno.h
index e86b6f34..d69edf81 100644
--- a/libs/libc/include/errno.h
+++ b/libs/libc/include/errno.h
@@ -12,6 +12,7 @@ extern int errno;
 #define EBADF 9       // Bad file descriptor
 #define EAGAIN 11     // Resource temporarily unavailable
 #define ENOMEM 12     // Cannot allocate memory
+#define EACCES 13     // Permission denied
 #define EFAULT 14     // Bad address
 #define EEXIST 17     // File exists
 #define ENOTDIR 20    // Not a directory
diff --git a/libs/libc/src/string.cpp b/libs/libc/src/string.cpp
index cb57c0af..a9a4b4ed 100644
--- a/libs/libc/src/string.cpp
+++ b/libs/libc/src/string.cpp
@@ -265,6 +265,7 @@ extern "C"
         case EBADF: return "Bad file descriptor";
         case EAGAIN: return "Resource temporarily unavailable";
         case ENOMEM: return "Cannot allocate memory";
+        case EACCES: return "Permission denied";
         case EFAULT: return "Bad address";
         case EEXIST: return "File exists";
         case ENOTDIR: return "Not a directory";