diff --git a/include/string.h b/include/string.h
index dfe142a270386398de038af21ed1434284b8a016..00c8e8ff5786ca36abd014babf4c94e6a5031317 100644
--- a/include/string.h
+++ b/include/string.h
@@ -56,6 +56,7 @@ char *stpncpy(char *, const char *, size_t);
 size_t strnlen (const char *, size_t);
 char *strdup (const char *);
 char *strndup (const char *, size_t);
+char *strsignal(int);
 #endif
 
 #if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
diff --git a/src/string/strsignal.c b/src/string/strsignal.c
index 72fba8d1218b351bcf100ee832e509d564d6d067..3b0ae6d7c7c16bfc2a59df60325d7dcd6b94b33d 100644
--- a/src/string/strsignal.c
+++ b/src/string/strsignal.c
@@ -1,4 +1,5 @@
 #include <signal.h>
+#include <string.h>
 
 #if (SIGHUP == 1) && (SIGINT == 2) && (SIGQUIT == 3) && (SIGILL == 4) \
  && (SIGTRAP == 5) && (SIGABRT == 6) && (SIGBUS == 7) && (SIGFPE == 8) \