diff --git a/src/system/libroot/posix/musl/string/strcat.c b/src/system/libroot/posix/musl/string/strcat.c
index 33f749b1d2..aedfc0dd1d 100644
--- a/src/system/libroot/posix/musl/string/strcat.c
+++ b/src/system/libroot/posix/musl/string/strcat.c
@@ -1,5 +1,9 @@
 #include <string.h>
 
+#if __GNUC__ < 4
+#define restrict
+#endif
+
 char *strcat(char *restrict dest, const char *restrict src)
 {
 	strcpy(dest + strlen(dest), src);
diff --git a/src/system/libroot/posix/musl/string/strncat.c b/src/system/libroot/posix/musl/string/strncat.c
index 01ca2a2317..93d8949aa0 100644
--- a/src/system/libroot/posix/musl/string/strncat.c
+++ b/src/system/libroot/posix/musl/string/strncat.c
@@ -1,5 +1,9 @@
 #include <string.h>
 
+#if __GNUC__ < 4
+#define restrict
+#endif
+
 char *strncat(char *restrict d, const char *restrict s, size_t n)
 {
 	char *a = d;