--- kdenlive-19.04.0/src/lib/external/media_ctrl/CMakeLists.txt~	2019-04-15 13:02:03.000000000 +0200
+++ kdenlive-19.04.0/src/lib/external/media_ctrl/CMakeLists.txt	2020-07-12 14:01:09.936884911 +0200
@@ -7,4 +7,5 @@
   add_library(media_ctrl STATIC
     mediactrl.c
   )
+  set_property(TARGET media_ctrl PROPERTY C_STANDARD 11)
 endif()
--- kdenlive-19.04.0/src/lib/external/kiss_fft/CMakeLists.txt~	2019-04-15 13:02:03.000000000 +0200
+++ kdenlive-19.04.0/src/lib/external/kiss_fft/CMakeLists.txt	2020-07-12 14:02:20.586846261 +0200
@@ -9,4 +9,5 @@
   kiss_fft.c
   tools/kiss_fftr.c
 )
+set_property(TARGET kiss_fft PROPERTY C_STANDARD 11)
 target_link_libraries(kiss_fft Qt5::Core)