diff --git a/srcpkgs/apr-util/patches/implicit-int.patch b/srcpkgs/apr-util/patches/implicit-int.patch
new file mode 100644
index 00000000000..8b0a73a592e
--- /dev/null
+++ b/srcpkgs/apr-util/patches/implicit-int.patch
@@ -0,0 +1,11 @@
+--- a/build/dbm.m4
++++ b/build/dbm.m4
+@@ -235,7 +235,7 @@ AC_DEFUN([APU_TRY_BERKELEY_DB],
+ #include <stdlib.h>
+ #include <stdio.h>
+ #include <$apu_try_berkeley_db_header>
+-main ()
++int main ()
+ {
+   int major, minor, patch;
+