Arduino : 1.6.9 (Windows 7), Carte : "Arduino Nano, ATmega328"

C:\Program Files (x86)\Arduino\arduino-builder -dump-prefs -logger=machine -hardware "C:\Program Files (x86)\Arduino\hardware" -tools "C:\Program Files (x86)\Arduino\tools-builder" -tools "C:\Program Files (x86)\Arduino\hardware\tools\avr" -built-in-libraries "C:\Program Files (x86)\Arduino\libraries" -libraries "C:\Users\Willy Vilter\- MES FICHIERS\Documents\Arduino\libraries" -fqbn=arduino:avr:nano:cpu=atmega328 -ide-version=10609 -build-path "C:\Users\WILLYV~1\AppData\Local\Temp\build4d528c575e90c7eb9d729c8c4a19c859.tmp" -warnings=all -prefs=build.warn_data_percentage=75 -verbose "C:\Users\WILLYV~1\AppData\Local\Temp\arduino_modified_sketch_863891\sketch_aug30a.ino"
C:\Program Files (x86)\Arduino\arduino-builder -compile -logger=machine -hardware "C:\Program Files (x86)\Arduino\hardware" -tools "C:\Program Files (x86)\Arduino\tools-builder" -tools "C:\Program Files (x86)\Arduino\hardware\tools\avr" -built-in-libraries "C:\Program Files (x86)\Arduino\libraries" -libraries "C:\Users\Willy Vilter\- MES FICHIERS\Documents\Arduino\libraries" -fqbn=arduino:avr:nano:cpu=atmega328 -ide-version=10609 -build-path "C:\Users\WILLYV~1\AppData\Local\Temp\build4d528c575e90c7eb9d729c8c4a19c859.tmp" -warnings=all -prefs=build.warn_data_percentage=75 -verbose "C:\Users\WILLYV~1\AppData\Local\Temp\arduino_modified_sketch_863891\sketch_aug30a.ino"
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics  -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10609 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR   "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\eightanaloginputs" "C:\Users\WILLYV~1\AppData\Local\Temp\build4d528c575e90c7eb9d729c8c4a19c859.tmp\sketch\sketch_aug30a.ino.cpp" -o "nul"
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics  -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10609 -DARDUINO_AVR_NANO -DARDUINO_ARCH_AVR   "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\eightanaloginputs" "C:\Users\WILLYV~1\AppData\Local\Temp\build4d528c575e90c7eb9d729c8c4a19c859.tmp\sketch\sketch_aug30a.ino.cpp" -o "C:\Users\WILLYV~1\AppData\Local\Temp\build4d528c575e90c7eb9d729c8c4a19c859.tmp\preproc\ctags_target_for_gcc_minus_e.cpp"
C:\Users\WILLYV~1\AppData\Local\Temp\arduino_modified_sketch_863891\sketch_aug30a.ino:5:19: fatal error: dht11.h: No such file or directory

 #include <dht11.h>

                   ^

compilation terminated.

exit status 1
Error compiling for board Arduino Nano.