diff --git a/boards/sim/sim/sim/scripts/Make.defs b/boards/sim/sim/sim/scripts/Make.defs
index 1e78f7951a1..e69ae6a9cdb 100644
--- a/boards/sim/sim/sim/scripts/Make.defs
+++ b/boards/sim/sim/sim/scripts/Make.defs
@@ -102,7 +102,7 @@ CFLAGS := $(ARCHWARNINGS) $(ARCHOPTIMIZATION) \
    -fshort-wchar
 CXXFLAGS := $(ARCHWARNINGSXX) $(ARCHOPTIMIZATION) \
    $(ARCHCPUFLAGSXX) $(ARCHXXINCLUDES) $(ARCHDEFINES) $(EXTRAFLAGS) -pipe \
-   -fshort-wchar
+   -fshort-wchar -std=c++17
 CPPFLAGS := $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRAFLAGS) \
    -fshort-wchar
 AFLAGS := $(CFLAGS) -D__ASSEMBLY__