diff --git a/src/h/ecl-cmp.h b/src/h/ecl-cmp.h
index 442aa6b32..5b6b4b6ba 100644
--- a/src/h/ecl-cmp.h
+++ b/src/h/ecl-cmp.h
@@ -32,8 +32,6 @@ typedef unsigned char uint8_t;
 typedef unsigned short uint16_t;
 #endif
 
-extern char **environ;
-
 #include <config.h>
 
 #ifdef ECL_THREADS
diff --git a/src/h/ecl.h b/src/h/ecl.h
index 2adc0a5c1..8c4c36fcc 100644
--- a/src/h/ecl.h
+++ b/src/h/ecl.h
@@ -33,8 +33,6 @@ typedef unsigned char uint8_t;
 typedef unsigned short uint16_t;
 #endif
 
-extern char **environ;
-
 #include <config.h>
 
 #ifdef ECL_THREADS