diff --git a/examples/corelib/threads/mandelbrot/mandelbrot.pro b/examples/corelib/threads/mandelbrot/mandelbrot.pro
index 5a01a405f2..92010fdc1f 100644
--- a/examples/corelib/threads/mandelbrot/mandelbrot.pro
+++ b/examples/corelib/threads/mandelbrot/mandelbrot.pro
@@ -6,7 +6,7 @@ SOURCES       = main.cpp \
                 mandelbrotwidget.cpp \
                 renderthread.cpp
 
-unix:!mac:!vxworks:!integrity:LIBS += -lm
+unix:!mac:!vxworks:!integrity:!haiku:LIBS += -lm
 
 # install
 target.path = $$[QT_INSTALL_EXAMPLES]/corelib/threads/mandelbrot
diff --git a/examples/widgets/itemviews/chart/chart.pro b/examples/widgets/itemviews/chart/chart.pro
index caa28276bc..4b64b01e8a 100644
--- a/examples/widgets/itemviews/chart/chart.pro
+++ b/examples/widgets/itemviews/chart/chart.pro
@@ -6,7 +6,7 @@ RESOURCES   = chart.qrc
 SOURCES     = main.cpp \
               mainwindow.cpp \
               pieview.cpp
-unix:!mac:!vxworks:!integrity:LIBS+= -lm
+unix:!mac:!vxworks:!integrity:!haiku:LIBS += -lm
 
 # install
 target.path = $$[QT_INSTALL_EXAMPLES]/widgets/itemviews/chart
diff --git a/examples/widgets/painting/painterpaths/painterpaths.pro b/examples/widgets/painting/painterpaths/painterpaths.pro
index 2d2db30739..dfff238dd1 100644
--- a/examples/widgets/painting/painterpaths/painterpaths.pro
+++ b/examples/widgets/painting/painterpaths/painterpaths.pro
@@ -5,7 +5,7 @@ HEADERS       = renderarea.h \
 SOURCES       = main.cpp \
                 renderarea.cpp \
                 window.cpp
-unix:!mac:!vxworks:!integrity:LIBS += -lm
+unix:!mac:!vxworks:!integrity:!haiku:LIBS += -lm
 
 # install
 target.path = $$[QT_INSTALL_EXAMPLES]/widgets/painting/painterpaths