diff --git a/library/psa_its_file.c b/library/psa_its_file.c
index 2fbff20..8dff783 100644
--- a/library/psa_its_file.c
+++ b/library/psa_its_file.c
@@ -52,6 +52,7 @@
 #define PSA_ITS_STORAGE_FILENAME_LENGTH         \
     ( sizeof( PSA_ITS_STORAGE_PREFIX ) - 1 + /*prefix without terminating 0*/ \
       16 + /*UID (64-bit number in hex)*/                               \
+      16 + /*UID (64-bit number in hex)*/                               \
       sizeof( PSA_ITS_STORAGE_SUFFIX ) - 1 + /*suffix without terminating 0*/ \
       1 /*terminating null byte*/ )
 #define PSA_ITS_STORAGE_TEMP \
diff --git a/tests/suites/test_suite_psa_its.function b/tests/suites/test_suite_psa_its.function
index 330846a..fb9ce07 100644
--- a/tests/suites/test_suite_psa_its.function
+++ b/tests/suites/test_suite_psa_its.function
@@ -17,6 +17,7 @@
 #define PSA_ITS_STORAGE_FILENAME_LENGTH         \
     ( sizeof( PSA_ITS_STORAGE_PREFIX ) - 1 + /*prefix without terminating 0*/ \
       16 + /*UID (64-bit number in hex)*/                               \
+      16 + /*UID (64-bit number in hex)*/                               \
       sizeof( PSA_ITS_STORAGE_SUFFIX ) - 1 + /*suffix without terminating 0*/ \
       1 /*terminating null byte*/ )
 #define PSA_ITS_STORAGE_TEMP \