1 files changed, 3 insertions, 1 deletions
diff --git a/compiler/options.nim b/compiler/options.nim
index d3f868316..2feaa2d43 100644
--- a/compiler/options.nim
+++ b/compiler/options.nim
@@ -595,7 +595,7 @@ proc isDefined*(conf: ConfigRef; symbol: string): bool =
                             osQnx, osAtari, osAix,
                             osHaiku, osVxWorks, osSolaris, osNetbsd,
                             osFreebsd, osOpenbsd, osDragonfly, osMacosx, osIos,
-                            osAndroid, osNintendoSwitch, osFreeRTOS, osCrossos}
+                            osAndroid, osNintendoSwitch, osFreeRTOS, osCrossos, osZephyr}
     of "linux":
       result = conf.target.targetOS in {osLinux, osAndroid}
     of "bsd":
@@ -615,6 +615,8 @@ proc isDefined*(conf: ConfigRef; symbol: string): bool =
       result = conf.target.targetOS == osNintendoSwitch
     of "freertos", "lwip":
       result = conf.target.targetOS == osFreeRTOS
+    of "zephyr":
+      result = conf.target.targetOS == osZephyr
     of "littleendian": result = CPU[conf.target.targetCPU].endian == littleEndian
     of "bigendian": result = CPU[conf.target.targetCPU].endian == bigEndian
     of "cpu8": result = CPU[conf.target.targetCPU].bit == 8