diff --git a/src/kernel/libroot/posix/stdlib/strtod.c b/src/kernel/libroot/posix/stdlib/strtod.c
index d4456946e0..279e15969f 100644
--- a/src/kernel/libroot/posix/stdlib/strtod.c
+++ b/src/kernel/libroot/posix/stdlib/strtod.c
@@ -1601,6 +1601,18 @@ strtod(const char * __restrict s00, char ** __restrict se)
 }
 
 
+double __strtod_internal(const char *number, char **_end, int group);
+
+double
+__strtod_internal(const char *number, char **_end, int group)
+{
+	// ToDo: group is currently not supported!
+	(void)group;
+
+	return strtod(number, _end);
+}
+
+
 /* removed from the build, is only used by __dtoa() */
 #if 0
 static int
diff --git a/src/kernel/libroot/posix/stdlib/strtol.c b/src/kernel/libroot/posix/stdlib/strtol.c
index d76d699364..fe8883673f 100644
--- a/src/kernel/libroot/posix/stdlib/strtol.c
+++ b/src/kernel/libroot/posix/stdlib/strtol.c
@@ -135,3 +135,16 @@ noconv:
 		*endptr = (char *)(any ? s - 1 : nptr);
 	return (acc);
 }
+
+
+long __strtol_internal(const char *number, char **_end, int base, int group);
+
+long
+__strtol_internal(const char *number, char **_end, int base, int group)
+{
+	// ToDo: group is currently not supported!
+	(void)group;
+
+	return strtol(number, _end, base);
+}
+
diff --git a/src/kernel/libroot/posix/stdlib/strtoll.c b/src/kernel/libroot/posix/stdlib/strtoll.c
index 5b0d307115..4771a122ff 100644
--- a/src/kernel/libroot/posix/stdlib/strtoll.c
+++ b/src/kernel/libroot/posix/stdlib/strtoll.c
@@ -137,3 +137,16 @@ noconv:
 
 	return acc;
 }
+
+
+long long __strtoll_internal(const char *number, char **_end, int base, int group);
+
+long long
+__strtoll_internal(const char *number, char **_end, int base, int group)
+{
+	// ToDo: group is currently not supported!
+	(void)group;
+
+	return strtoll(number, _end, base);
+}
+
diff --git a/src/kernel/libroot/posix/stdlib/strtoul.c b/src/kernel/libroot/posix/stdlib/strtoul.c
index b5e85a52dd..76f7c349c3 100644
--- a/src/kernel/libroot/posix/stdlib/strtoul.c
+++ b/src/kernel/libroot/posix/stdlib/strtoul.c
@@ -114,3 +114,16 @@ noconv:
 		*endptr = (char *)(any ? s - 1 : nptr);
 	return (acc);
 }
+
+
+unsigned long __strtoul_internal(const char *number, char **_end, int base, int group);
+
+unsigned long
+__strtoul_internal(const char *number, char **_end, int base, int group)
+{
+	// ToDo: group is currently not supported!
+	(void)group;
+
+	return strtoul(number, _end, base);
+}
+
diff --git a/src/kernel/libroot/posix/stdlib/strtoull.c b/src/kernel/libroot/posix/stdlib/strtoull.c
index 164da2668d..709dc2bb76 100644
--- a/src/kernel/libroot/posix/stdlib/strtoull.c
+++ b/src/kernel/libroot/posix/stdlib/strtoull.c
@@ -115,3 +115,16 @@ noconv:
 
 	return acc;
 }
+
+
+unsigned long long __strtoull_internal(const char *number, char **_end, int base, int group);
+
+unsigned long long
+__strtoull_internal(const char *number, char **_end, int base, int group)
+{
+	// ToDo: group is currently not supported!
+	(void)group;
+
+	return strtoull(number, _end, base);
+}
+