diff --git a/src/common/header/shared.h b/src/common/header/shared.h
index 35939b90..492986c1 100644
--- a/src/common/header/shared.h
+++ b/src/common/header/shared.h
@@ -335,6 +335,7 @@ void Q_strdel(char *s, size_t i, size_t n);
 /* Insert src into dest starting at index i, total, n is the total size of the buffer */
 /* Returns length of src on success, 0 if there is not enough space in dest for src */
 size_t Q_strins(char *dest, const char *src, size_t i, size_t n);
+qboolean Q_strisnum(const char *s);
 
 /* ============================================= */
 
diff --git a/src/common/shared/shared.c b/src/common/shared/shared.c
index 792ffde8..e7521725 100644
--- a/src/common/shared/shared.c
+++ b/src/common/shared/shared.c
@@ -1190,6 +1190,20 @@ Q_strins(char *dest, const char *src, size_t i, size_t n)
 	return slen;
 }
 
+qboolean
+Q_strisnum(const char *s)
+{
+	for (; *s != '\0'; s++)
+	{
+		if (!isdigit(*s))
+		{
+			return false;
+		}
+	}
+
+	return true;
+}
+
 /*
  * An unicode compatible fopen() Wrapper for Windows.
  */