diff --git a/libs/image/kis_filter_weights_buffer.h b/libs/image/kis_filter_weights_buffer.h
index aea68b9..434b965 100644
--- a/libs/image/kis_filter_weights_buffer.h
+++ b/libs/image/kis_filter_weights_buffer.h
@@ -45,10 +45,10 @@ static bool checkForAsymmetricZeros = false;
                 if ((m_filterWeights[i].weight[j] && !m_filterWeights[i].weight[idx2]) || \
                     (!m_filterWeights[i].weight[j] && m_filterWeights[i].weight[idx2])) { \
                                                                         \
-                    dbgKrita << "*******";                              \
-                    dbgKrita << "Non-symmetric zero found:" << centerSrc; \
-                    dbgKrita << "Weight" << j << ":" << m_filterWeights[i].weight[j]; \
-                    dbgKrita << "Weight" << idx2 << ":" << m_filterWeights[i].weight[idx2]; \
+                    qDebug() << "*******";                              \
+                    qDebug() << "Non-symmetric zero found:" << centerSrc; \
+                    qDebug() << "Weight" << j << ":" << m_filterWeights[i].weight[j]; \
+                    qDebug() << "Weight" << idx2 << ":" << m_filterWeights[i].weight[idx2]; \
                     qFatal("Non-symmetric zero -> fail");               \
                 }                                                       \
             }                                                           \
@@ -66,22 +66,24 @@ static bool checkForAsymmetricZeros = false;
 #define SANITY_CHECKSUM()
 #endif
 
+#define DEBUG_ENABLED
+
 #ifdef DEBUG_ENABLED
 #define DEBUG_ALL()                                                     \
     do {                                                                \
-        dbgKrita << "************** i =" << i;                          \
-        dbgKrita << ppVar(centerSrc);                                   \
-        dbgKrita << ppVar(centerIndex);                                 \
-        dbgKrita << ppVar(beginSrc) << ppVar(endSrc);                   \
-        dbgKrita << ppVar(beginDst) << ppVar(endDst);                   \
-        dbgKrita << ppVar(scaledIter) << ppVar(scaledInc);              \
-        dbgKrita << ppVar(span);                                        \
-        dbgKrita << "===";                                              \
+        qDebug() << "************** i =" << i;                          \
+        qDebug() << ppVar(centerSrc);                                   \
+        qDebug() << ppVar(centerIndex);                                 \
+        qDebug() << ppVar(beginSrc) << ppVar(endSrc);                   \
+        qDebug() << ppVar(beginDst) << ppVar(endDst);                   \
+        qDebug() << ppVar(scaledIter) << ppVar(scaledInc);              \
+        qDebug() << ppVar(span);                                        \
+        qDebug() << "===";                                              \
     } while (0)
 
 #define DEBUG_SAMPLE()                                                  \
     do {                                                                \
-        dbgKrita << ppVar(scaledIter) << ppVar(t);                      \
+        qDebug() << ppVar(scaledIter) << ppVar(t);                      \
     } while (0)
 #else
 #define DEBUG_ALL() Q_UNUSED(beginDst); Q_UNUSED(endDst)
diff --git a/libs/image/tests/kis_filter_weights_applicator_test.cpp b/libs/image/tests/kis_filter_weights_applicator_test.cpp
index d142cb7..2030c39 100644
--- a/libs/image/tests/kis_filter_weights_applicator_test.cpp
+++ b/libs/image/tests/kis_filter_weights_applicator_test.cpp
@@ -67,6 +67,12 @@ void testSpan(qreal scale, qreal dx, int dst_l,
     }
 }
 
+void KisFilterWeightsApplicatorTest::testSpan_Scale_0_5_Aligned_NN()
+{
+    KisFilterStrategy *filter = new KisBoxFilterStrategy();
+    KisFilterWeightsBuffer buf(filter, 0.5);
+}
+
 void KisFilterWeightsApplicatorTest::testSpan_Scale_2_0_Aligned()
 {
     testSpan(2.0, 0.0, 0, -1, 0.25, 1.0);
diff --git a/libs/image/tests/kis_filter_weights_applicator_test.h b/libs/image/tests/kis_filter_weights_applicator_test.h
index e9e2c25..5777cbf 100644
--- a/libs/image/tests/kis_filter_weights_applicator_test.h
+++ b/libs/image/tests/kis_filter_weights_applicator_test.h
@@ -25,6 +25,9 @@ class KisFilterWeightsApplicatorTest : public QObject
 {
     Q_OBJECT
 private Q_SLOTS:
+    void testSpan_Scale_0_5_Aligned_NN();
+
+
     void testSpan_Scale_2_0_Aligned();
     void testSpan_Scale_2_0_Shift_0_5();
     void testSpan_Scale_2_0_Shift_0_75();