diff --git a/libcork/include/libcork/config/solaris.h b/libcork/include/libcork/config/solaris.h
index 9f0bf0e8..6001b9a0 100644
--- a/libcork/include/libcork/config/solaris.h
+++ b/libcork/include/libcork/config/solaris.h
@@ -27,7 +27,7 @@
 #error "Cannot determine system endianness"
 #endif
 
-#define CORK_HAVE_REALLOCF  1
+#define CORK_HAVE_REALLOCF  0
 #define CORK_HAVE_PTHREADS  1