diff --git a/Kernel/API/POSIX/unistd.h b/Kernel/API/POSIX/unistd.h
index 6a9a36dfd23..cc3ce83612d 100644
--- a/Kernel/API/POSIX/unistd.h
+++ b/Kernel/API/POSIX/unistd.h
@@ -40,6 +40,7 @@ enum {
     _SC_TTY_NAME_MAX,
     _SC_PAGESIZE,
     _SC_GETPW_R_SIZE_MAX,
+    _SC_GETGR_R_SIZE_MAX,
     _SC_CLK_TCK,
     _SC_SYMLOOP_MAX,
     _SC_MAPPED_FILES,
@@ -57,6 +58,7 @@ enum {
 #define _SC_HOST_NAME_MAX _SC_HOST_NAME_MAX
 #define _SC_TTY_NAME_MAX _SC_TTY_NAME_MAX
 #define _SC_GETPW_R_SIZE_MAX _SC_GETPW_R_SIZE_MAX
+#define _SC_GETGR_R_SIZE_MAX _SC_GETGR_R_SIZE_MAX
 #define _SC_CLK_TCK _SC_CLK_TCK
 #define _SC_SYMLOOP_MAX _SC_SYMLOOP_MAX
 #define _SC_MAPPED_FILES _SC_MAPPED_FILES
diff --git a/Kernel/Syscalls/sysconf.cpp b/Kernel/Syscalls/sysconf.cpp
index b9d4ee01815..cda8e3dd404 100644
--- a/Kernel/Syscalls/sysconf.cpp
+++ b/Kernel/Syscalls/sysconf.cpp
@@ -29,6 +29,7 @@ ErrorOr<FlatPtr> Process::sys$sysconf(int name)
     case _SC_TTY_NAME_MAX:
         return TTY_NAME_MAX;
     case _SC_GETPW_R_SIZE_MAX:
+    case _SC_GETGR_R_SIZE_MAX:
         return 4096; // idk
     case _SC_CLK_TCK:
         return TimeManagement::the().ticks_per_second();