diff --git a/rtl/bsd/sysctl.pp b/rtl/bsd/sysctl.pp
index 6eeddd327b..2480d93169 100644
--- a/rtl/bsd/sysctl.pp
+++ b/rtl/bsd/sysctl.pp
@@ -83,7 +83,7 @@ TYPE    CtlNameRec = Record
 {$ifdef FPC_USE_LIBC}
 function FPsysctl (Name: pchar; namelen:cuint; oldp:pointer;oldlenp:psize_t; newp:pointer;newlen:size_t):cint; cdecl; external name 'sysctl';
 function FPsysctlbyname (Name: pchar; oldp:pointer;oldlenp:psize_t; newp:pointer;newlen:size_t):cint; cdecl; external name 'sysctlbyname';
-function FPsysctlnametomib (Name: pchar;mibp:pcint;sizep:psize_t):cint; cdecl; external name 'sysctltomib';
+function FPsysctlnametomib (Name: pchar;mibp:pcint;sizep:psize_t):cint; cdecl; external name 'sysctlnametomib';
 {$else}
 function FPsysctl (Name: pchar; namelen:cuint; oldp:pointer;oldlenp:psize_t; newp:pointer;newlen:size_t):cint;
 function FPsysctlbyname (Name: pchar; oldp:pointer;oldlenp:psize_t; newp:pointer;newlen:size_t):cint;