diff --git a/libguile/eval.c b/libguile/eval.c
index 5111dc28d..bdb4b0a98 100644
--- a/libguile/eval.c
+++ b/libguile/eval.c
@@ -54,6 +54,9 @@
 
 #ifndef DEVAL
 
+/* We need this to get the definitions for HAVE_ALLOCA_H, etc.  */
+#include "scmconfig.h"
+
 /* AIX requires this to be the first thing in the file.  The #pragma
    directive is indented so pre-ANSI compilers will ignore it, rather
    than choke on it.  */