diff --git a/libcaca.spec b/libcaca.spec
index b3f0155..491e19d 100644
--- a/libcaca.spec
+++ b/libcaca.spec
@@ -35,6 +35,7 @@ Patch9:         caca-no-build-date.patch
 Patch10:        libcaca-ncurses6.patch
 # PATCH-FIX-UPSTREAM correctly-handle-zero-width-or-height-images.patch bsc#1197028 gh#cacalabs/libcaca#66
 Patch100:       bsc1197028-correctly-handle-zero-width-or-height-images.patch
+BuildRequires:  autoconf >= 2.71
 BuildRequires:  doxygen
 BuildRequires:  fdupes
 BuildRequires:  freeglut-devel