diff --git a/src/common_io.c b/src/common_io.c
index 3bf0b91cb68babf3649afe5b3fb194e3071b04d0..11ec6ef1cdffce28285d5c5db2c8e7e139267b25 100644
--- a/src/common_io.c
+++ b/src/common_io.c
@@ -315,7 +315,7 @@ void io_read_unit_system(hid_t h_file, struct unit_system* us) {
 
     return;
   } else if (exists < 0) {
-    error("Serious problem with 'Units' group your ICs. H5Lexists gives %d",
+    error("Serious problem with 'Units' group in ICs. H5Lexists gives %d",
           exists);
   }