diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 2b2dabade..97586f807 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -48,7 +48,7 @@ build_clang_tidy:
 
   script:
     - srcdir=`pwd` && mkdir -p /tmp/okular_build && cd /tmp/okular_build && CC=clang CXX=clazy CXXFLAGS="-Werror -Wno-deprecated-declarations" cmake -DCMAKE_EXPORT_COMPILE_COMMANDS=ON -G Ninja $srcdir && cat compile_commands.json | jq  '[.[] | select(.file | contains("'"$srcdir"'"))]' > compile_commands.aux.json && cat compile_commands.aux.json | jq  '[.[] | select(.file | contains("/synctex/")| not)]' > compile_commands.json
-    - CLAZY_CHECKS="qstring-arg" ninja
+    - CLAZY_CHECKS="qstring-arg,incorrect-emit,qhash-namespace" ninja
     # Fix the poppler header, remove when debian:unstable ships poppler 0.82 or later
     - sed -i "N;N;N;N; s#class MediaRendition\;\nclass MovieAnnotation\;\nclass ScreenAnnotation;#class MediaRendition\;#g"  /usr/include/poppler/qt5/poppler-link.h
     - "run-clang-tidy -header-filter='.*/okular/.*' -checks='-*,performance-*,bugprone-*,readability-inconsistent-declaration-parameter-name,readability-string-compare,modernize-redundant-void-arg,modernize-use-bool-literals,modernize-make-unique,modernize-make-shared,modernize-use-override,modernize-use-equals-delete,modernize-use-emplace,modernize-loop-convert,modernize-use-nullptr,-bugprone-macro-parentheses,-bugprone-narrowing-conversions,-bugprone-branch-clone,-bugprone-incorrect-roundings' -config=\"{WarningsAsErrors: '*'}\""
diff --git a/core/area.cpp b/core/area.cpp
index 08b19723c..11803e447 100644
--- a/core/area.cpp
+++ b/core/area.cpp
@@ -258,9 +258,9 @@ void NormalizedRect::transform( const QTransform &matrix )
     bottom = rect.bottom();
 }
 
-uint qHash( const NormalizedRect& r, uint seed )
+uint Okular::qHash( const NormalizedRect& r, uint seed )
 {
-    return qHash(r.bottom, qHash(r.right, qHash(r.top, qHash(r.left, seed))));
+    return ::qHash(r.bottom, ::qHash(r.right, ::qHash(r.top, ::qHash(r.left, seed))));
 }
 
 QDebug operator<<( QDebug str, const Okular::NormalizedRect& r )
diff --git a/core/area.h b/core/area.h
index ba09c1cb8..0746acdff 100644
--- a/core/area.h
+++ b/core/area.h
@@ -980,9 +980,9 @@ class HighlightAreaRect : public RegularAreaRect
         QColor color;
 };
 
+uint qHash(const Okular::NormalizedRect& r, uint seed = 0);
 }
 
-uint qHash(const Okular::NormalizedRect& r, uint seed = 0);
 
 #ifndef QT_NO_DEBUG_STREAM
 /**