diff --git a/alkimia.spec b/alkimia.spec
index 2891838..eaf96d9 100644
--- a/alkimia.spec
+++ b/alkimia.spec
@@ -29,6 +29,7 @@ Source0:        https://download.kde.org/stable/%{name}/%{version}/%{name}-%{ver
 BuildRequires:  doxygen
 BuildRequires:  extra-cmake-modules
 BuildRequires:  gmp-devel
+BuildRequires:  libmpir-devel
 BuildRequires:  cmake(KF5Config)
 BuildRequires:  cmake(KF5CoreAddons)
 BuildRequires:  cmake(KF5KDELibs4Support)