diff --git a/dtool/Config.Linux.pp b/dtool/Config.Linux.pp
index 443f81f2f6..7d020fead7 100644
--- a/dtool/Config.Linux.pp
+++ b/dtool/Config.Linux.pp
@@ -56,7 +56,7 @@
 #define HAVE_IOS_TYPEDEFS 1
 
 // Can we safely call getenv() at static init time?
-#define STATIC_INIT_GETENV
+#define STATIC_INIT_GETENV 1
 
 // Can we read the file /proc/self/environ to determine our
 // environment variables at static init time?