diff --git a/src/bipack_sink.rs b/src/bipack_sink.rs
index 5978a82..bb8c5df 100644
--- a/src/bipack_sink.rs
+++ b/src/bipack_sink.rs
@@ -89,6 +89,19 @@ pub trait BipackSink {
         self.put_fixed_bytes(&result);
     }
 
+    fn put_i64(self: &mut Self, value: i64) {
+        self.put_u64(value as u64)
+    }
+    fn put_i32(self: &mut Self, value: i32) {
+        self.put_u32(value as u32)
+    }
+    fn put_i16(self: &mut Self, value: i16) {
+        self.put_u16(value as u16)
+    }
+    fn put_i8(self: &mut Self, value: i8) {
+        self.put_u8(value as u8)
+    }
+
     /// Put unsigned value to compressed variable-length format, `Smartint` in the bipack
     /// terms. This format is used to store size of variable-length binaries and strings.
     /// Use [crate::bipack_source::BipackSource::get_unsigned] to unpack it.
diff --git a/src/bipack_source.rs b/src/bipack_source.rs
index 6a23960..f04185f 100644
--- a/src/bipack_source.rs
+++ b/src/bipack_source.rs
@@ -61,6 +61,19 @@ pub trait BipackSource {
         Ok(((self.get_u32()? as u64) << 32) | (self.get_u32()? as u64))
     }
 
+    fn get_i64(self: &mut Self) -> Result<i64> {
+        Ok(self.get_u64()? as i64)
+    }
+    fn get_i32(self: &mut Self) -> Result<i32> {
+        Ok(self.get_u32()? as i32)
+    }
+    fn get_i16(self: &mut Self) -> Result<i16> {
+        Ok(self.get_u16()? as i16)
+    }
+    fn get_i8(self: &mut Self) -> Result<i8> {
+        Ok(self.get_u8()? as i8)
+    }
+
     /// Unpack variable-length packed unsigned value, used aslo internally to store size
     /// of arrays, binary data, strings, etc. To pack use
     /// [crate::bipack_sink::BipackSink::put_unsigned()].
diff --git a/src/lib.rs b/src/lib.rs
index e7d1e1b..f9a4a25 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -189,6 +189,44 @@ mod tests {
         assert_eq!("Hello, rupack!", src.get_str().unwrap());
     }
 
+    #[test]
+    fn test_signed() -> Result<()> {
+        fn test64(value: i64) -> Result<()> {
+            let mut x = Vec::new();
+            x.put_i64(value);
+            assert_eq!(value, SliceSource::from(&x).get_i64()?);
+            Ok(())
+        }
+        test64(0)?;
+        test64(1)?;
+        test64(-1)?;
+        test64(9223372036854775807)?;
+        test64(-9223372036854775808)?;
+        fn test32(value: i32) -> Result<()> {
+            let mut x = Vec::new();
+            x.put_i32(value);
+            assert_eq!(value, SliceSource::from(&x).get_i32()?);
+            Ok(())
+        }
+        test32(0)?;
+        test32(1)?;
+        test32(-1)?;
+        test32(2147483647)?;
+        test32(-2147483648)?;
+        fn test16(value: i16) -> Result<()> {
+            let mut x = Vec::new();
+            x.put_i16(value);
+            assert_eq!(value, SliceSource::from(&x).get_i16()?);
+            Ok(())
+        }
+        test16(0)?;
+        test16(1)?;
+        test16(-1)?;
+        test16(32767)?;
+        test16(-32768)?;
+        Ok(())
+    }
+
     #[test]
     fn test_dump() {
         for l in 0..64 {