diff --git a/waftools/detections/compiler.py b/waftools/detections/compiler.py
index a3ad2835d2..f473680bc6 100644
--- a/waftools/detections/compiler.py
+++ b/waftools/detections/compiler.py
@@ -15,7 +15,7 @@ def __add_generic_flags__(ctx):
     ctx.env.CFLAGS += ["-D_ISOC99_SOURCE", "-D_GNU_SOURCE",
                        "-D_LARGEFILE_SOURCE", "-D_FILE_OFFSET_BITS=64",
                        "-D_LARGEFILE64_SOURCE",
-                       "-std=gnu99", "-Wall"]
+                       "-std=c99", "-Wall"]
 
     if ctx.is_debug_build():
         ctx.env.CFLAGS += ['-g']