diff --git a/igzip/Makefile.am b/igzip/Makefile.am
index c916475..7e90568 100644
--- a/igzip/Makefile.am
+++ b/igzip/Makefile.am
@@ -67,7 +67,7 @@ extern_hdrs +=	include/igzip_lib.h
 
 check_tests +=  igzip/igzip_rand_test
 check_tests +=  igzip/igzip_wrapper_hdr_test
-unit_tests  +=  igzip/checksum32_funcs_test
+check_tests +=  igzip/checksum32_funcs_test
 
 other_tests +=  igzip/igzip_file_perf igzip/igzip_stateless_file_perf igzip/igzip_hist_perf
 other_tests +=  igzip/igzip_perf
diff --git a/igzip/checksum32_funcs_test.c b/igzip/checksum32_funcs_test.c
index ba0c4c7..cbb5d1b 100644
--- a/igzip/checksum32_funcs_test.c
+++ b/igzip/checksum32_funcs_test.c
@@ -33,6 +33,7 @@
 #include <stdint.h>
 #include "igzip_checksums.h"
 #include "checksum_test_ref.h"
+#include "types.h"
 
 #ifndef TEST_SEED
 # define TEST_SEED 0x1234
diff --git a/include/igzip_lib.h b/include/igzip_lib.h
index 800fa7b..a8b8779 100644
--- a/include/igzip_lib.h
+++ b/include/igzip_lib.h
@@ -914,6 +914,23 @@ int isal_inflate(struct inflate_state *state);
  */
 int isal_inflate_stateless(struct inflate_state *state);
 
+/******************************************************************************/
+/* Other functions */
+/******************************************************************************/
+/**
+ * @brief Calculate Adler-32 checksum, runs appropriate version.
+ *
+ * This function determines what instruction sets are enabled and selects the
+ * appropriate version at runtime.
+ *
+ * @param init: initial Adler-32 value
+ * @param buf: buffer to calculate checksum on
+ * @param len: buffer length in bytes
+ *
+ * @returns 32-bit Adler-32 checksum
+ */
+uint32_t isal_adler32(uint32_t init, const unsigned char *buf, uint64_t len);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/isa-l.def b/isa-l.def
index 220d48d..b41754c 100644
--- a/isa-l.def
+++ b/isa-l.def
@@ -105,9 +105,10 @@ isal_deflate_reset              @101
 isal_inflate_set_dict           @102
 isal_inflate_reset              @103
 crc16_t10dif_copy               @104
-isal_read_gzip_header   	@105
-isal_read_zlib_header   	@106
-isal_write_gzip_header   	@107
-isal_write_zlib_header   	@108
-isal_zero_detect		@109
-isal_gzip_header_init		@110
+isal_read_gzip_header           @105
+isal_read_zlib_header           @106
+isal_write_gzip_header          @107
+isal_write_zlib_header          @108
+isal_zero_detect                @109
+isal_gzip_header_init           @110
+isal_adler32                    @111