diff --git a/data/CMakeLists.txt b/data/CMakeLists.txt
--- a/data/CMakeLists.txt
+++ b/data/CMakeLists.txt
@@ -10,7 +10,7 @@
 ecm_mark_nongui_executable(gentrigrams)
 
 TARGET_LINK_LIBRARIES(parsetrigrams PUBLIC Qt5::Core)
-TARGET_LINK_LIBRARIES(gentrigrams PUBLIC Qt5::Core)
+TARGET_LINK_LIBRARIES(gentrigrams PUBLIC Qt5::Core KF5::SonnetCore)
 INSTALL(TARGETS parsetrigrams EXPORT KF5SonnetTargets ${KF5_INSTALL_TARGETS_DEFAULT_ARGS})
 INSTALL(TARGETS gentrigrams EXPORT KF5SonnetTargets ${KF5_INSTALL_TARGETS_DEFAULT_ARGS})
 
diff --git a/data/gentrigrams.cpp b/data/gentrigrams.cpp
--- a/data/gentrigrams.cpp
+++ b/data/gentrigrams.cpp
@@ -25,6 +25,7 @@
 #include <QtCore/QHash>
 #include <QtCore/QString>
 #include <QtCore/QDebug>
+#include "guesslanguage.h"
 
 int main(int argc, char *argv[])
 {
@@ -75,9 +76,8 @@
 
     qDebug() << "Weeding out...";
     QMap<int, QString>::iterator i = orderedTrigrams.begin();
-    while (orderedTrigrams.size() > 300) {
-        orderedTrigrams.erase(i);
-        i++;
+    while (orderedTrigrams.size() > Sonnet::MAXGRAMS) {
+        i = orderedTrigrams.erase(i);
     }
     qDebug() << "Weeded!";
 
diff --git a/src/core/guesslanguage.h b/src/core/guesslanguage.h
--- a/src/core/guesslanguage.h
+++ b/src/core/guesslanguage.h
@@ -28,6 +28,9 @@
 namespace Sonnet
 {
 
+// Amount of trigrams in each file
+static const int MAXGRAMS = 300;
+
 class GuessLanguagePrivate;
 
 /**
diff --git a/src/core/guesslanguage.cpp b/src/core/guesslanguage.cpp
--- a/src/core/guesslanguage.cpp
+++ b/src/core/guesslanguage.cpp
@@ -61,9 +61,6 @@
 namespace Sonnet
 {
 
-// Amount of trigrams in each file
-static const int MAXGRAMS = 300;
-
 class GuessLanguagePrivate
 {
 public: