diff --git a/gfalibs b/gfalibs
index bf3346b..d699003 160000
--- a/gfalibs
+++ b/gfalibs
@@ -1 +1 @@
-Subproject commit bf3346b55ccce060ad693ae40d624832b493028c
+Subproject commit d69900322835d3ea8ad7dd6cfcfe9fb27fbb09b5
diff --git a/src/input.cpp b/src/input.cpp
index fba59d4..fa9897a 100644
--- a/src/input.cpp
+++ b/src/input.cpp
@@ -48,10 +48,6 @@ void Input::loadDB() {
         getline(file, line);
         file.close();
         userInput.kLen = stol(line);
-        if (userInput.kLen < userInput.kPrefixLen)
-            userInput.kPrefixLen = userInput.kLen;
-        else
-            userInput.kPrefixLen = std::min((uint32_t)31,userInput.kLen);
     }else if (userInput.kmerDB.size() > 1) {
         fprintf(stderr, "More than one DB provided. Merge them first. Exiting.\n");
         exit(EXIT_FAILURE);
@@ -146,10 +142,6 @@ void Input::read() { // reads the actual input and performing the tasks
             }
             
             userInput.kLen = k;
-            if (userInput.kLen < userInput.kPrefixLen)
-                userInput.kPrefixLen = userInput.kLen;
-            else
-                userInput.kPrefixLen = std::min((uint32_t)31,userInput.kLen);
             
             KDB kcount(userInput); // a new empty kmerdb with the specified kmer length
             
diff --git a/src/main.cpp b/src/main.cpp
index 6911288..6f61188 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -141,12 +141,8 @@ int main(int argc, char **argv) {
                         }
                         
                         userInput.kLen = atol(optarg);
-                        if (userInput.kLen < userInput.kPrefixLen)
-                            userInput.kPrefixLen = userInput.kLen;
-                        else
-                            userInput.kPrefixLen = std::min((uint32_t)31,userInput.kLen);
                         break;
-                    case 's': // kmer length
+                    case 's': // smer length
                         
                         if (!isNumber(optarg)) {
                             fprintf(stderr, "input '%s' to option -%c must be a number\n", optarg, optopt);