diff --git a/headers/compatibility/gnu/string.h b/headers/compatibility/gnu/string.h
deleted file mode 100644
index deedcb4193..0000000000
--- a/headers/compatibility/gnu/string.h
+++ /dev/null
@@ -1,31 +0,0 @@
-/*
- * Copyright 2018 Haiku, Inc. All Rights Reserved.
- * Distributed under the terms of the MIT License.
- */
-#ifndef _GNU_STRING_H_
-#define _GNU_STRING_H_
-
-
-#include_next <string.h>
-#include <features.h>
-
-
-#ifdef _DEFAULT_SOURCE
-
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-extern void *memmem(const void *source, size_t sourceLength,
-	const void *search, size_t searchLength);
-
-#ifdef __cplusplus
-}
-#endif
-
-
-#endif
-
-
-#endif	/* _GNU_STRING_H_ */
diff --git a/headers/posix/string.h b/headers/posix/string.h
index 79931fd834..7fa188f315 100644
--- a/headers/posix/string.h
+++ b/headers/posix/string.h
@@ -22,6 +22,8 @@ extern void		*memcpy(void *dest, const void *source, size_t length);
 extern void		*memccpy(void *dest, const void *source, int stopByte, size_t length);
 extern void		*memmove(void *dest, const void *source, size_t length);
 extern void		*memset(void *dest, int value, size_t length);
+extern void 	*memmem(const void *source, size_t sourceLength,
+	const void *search, size_t searchLength);
 
 #ifdef _DEFAULT_SOURCE
 extern void		*memrchr(const void *source, int value, size_t length);
diff --git a/src/libs/gnu/Jamfile b/src/libs/gnu/Jamfile
index d506f3d55e..386de68895 100644
--- a/src/libs/gnu/Jamfile
+++ b/src/libs/gnu/Jamfile
@@ -17,7 +17,6 @@ for architectureObject in [ MultiArchSubDirSetup ] {
 
 		SharedLibrary [ MultiArchDefaultGristFiles libgnu.so ] :
 			crypt.cpp
-			memmem.c
 			qsort.c
 			sched_affinity.cpp
 			sched_getcpu.cpp
diff --git a/src/system/libroot/posix/string/Jamfile b/src/system/libroot/posix/string/Jamfile
index 4f67a2c887..ffcfd72545 100644
--- a/src/system/libroot/posix/string/Jamfile
+++ b/src/system/libroot/posix/string/Jamfile
@@ -23,6 +23,7 @@ for architectureObject in [ MultiArchSubDirSetup ] {
 			memccpy.c
 			memchr.c
 			memcmp.c
+			memmem.c
 			memmove.c
 			stpcpy.c
 			strcasecmp.c
diff --git a/src/libs/gnu/memmem.c b/src/system/libroot/posix/string/memmem.c
similarity index 100%
rename from src/libs/gnu/memmem.c
rename to src/system/libroot/posix/string/memmem.c