diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2dbf2d7..66d3c1a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -464,6 +464,8 @@ set(INNOEXTRACT_SOURCES
 )
 
 set(UNITTEST_SOURCES
+
+	src/crypto/adler32.cpp
 	
 	src/util/test.hpp
 	src/util/test.cpp
diff --git a/src/crypto/adler32.cpp b/src/crypto/adler32.cpp
index 7b271a5..d7d0317 100644
--- a/src/crypto/adler32.cpp
+++ b/src/crypto/adler32.cpp
@@ -23,6 +23,8 @@
 
 #include "crypto/adler32.hpp"
 
+#include "util/test.hpp"
+
 namespace crypto {
 
 void adler32::update(const char * data, size_t length) {
@@ -74,4 +76,13 @@ void adler32::update(const char * data, size_t length) {
 	
 }
 
+INNOEXTRACT_TEST(adler32,
+	
+	adler32 checksum;
+	checksum.init();
+	checksum.update(testdata, testlen);
+	test("checksum", checksum.finalize() == 0xb8a36c4a);
+	
+)
+
 } // namespace crypto