diff --git a/configure.in b/configure.in
index c7265964..d3cc86b6 100644
--- a/configure.in
+++ b/configure.in
@@ -48,7 +48,6 @@ AH_TEMPLATE([TARGET_CPU], [Target CPU name])
 
 AC_PROG_CC
 AC_PROG_CC_STDC
-AC_C_PROTOTYPES
 
 # -- Helper programs --