diff --git a/helper.pl b/helper.pl
index 5fc42dd..dc9b555 100755
--- a/helper.pl
+++ b/helper.pl
@@ -278,7 +278,7 @@ sub patch_file {
 sub version_from_tomcrypt_h {
   my $h = read_file(shift);
   if ($h =~ /\n#define\s*SCRYPT\s*"([0-9]+)\.([0-9]+)\.([0-9]+)(.*)"/s) {
-    return "VERSION_PC=$1.$2.$3", "VERSION_LT=1:0", "VERSION=$1.$2.$3$4", "PROJECT_NUMBER=$1.$2.$3$4";
+    return "VERSION_PC=$1.$2.$3", "VERSION_LT=1:1", "VERSION=$1.$2.$3$4", "PROJECT_NUMBER=$1.$2.$3$4";
   }
   else {
     die "#define SCRYPT not found in tomcrypt.h";
diff --git a/makefile_include.mk b/makefile_include.mk
index f4e14e4..3105eff 100644
--- a/makefile_include.mk
+++ b/makefile_include.mk
@@ -6,7 +6,7 @@
 VERSION=1.18.1
 VERSION_PC=1.18.1
 # http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
-VERSION_LT=1:0
+VERSION_LT=1:1
 
 # Compiler and Linker Names
 ifndef CROSS_COMPILE