diff --git a/rts/RtsSymbols.c b/rts/RtsSymbols.c
index 2782d3632f58557f4d476ea57e1376a123105ebf..e8c60d2c07e01b8e0f7f2e211330ae35f6e1c52f 100644
--- a/rts/RtsSymbols.c
+++ b/rts/RtsSymbols.c
@@ -61,6 +61,7 @@
       SymI_HasProto(stg_sig_install)            \
       SymI_HasProto(rtsTimerSignal)             \
       SymI_HasProto(atexit)                     \
+      SymI_NeedsDataProto(environ)              \
       SymI_NeedsDataProto(nocldstop)
 #endif