diff --git a/README.rst b/README.rst
index da3cc6496..40d45196c 100644
--- a/README.rst
+++ b/README.rst
@@ -66,7 +66,7 @@ for documentation: [optional]
 for gstreamer: [optional]
 	libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev
 
-for IPA module signing: [optional]
+for IPA module signing: [required]
         libgnutls28-dev openssl
 
 for qcam: [optional]
diff --git a/src/libcamera/meson.build b/src/libcamera/meson.build
index dcd2fb490..874d25904 100644
--- a/src/libcamera/meson.build
+++ b/src/libcamera/meson.build
@@ -62,7 +62,7 @@ subdir('proxy')
 
 libatomic = cc.find_library('atomic', required : false)
 libdl = cc.find_library('dl')
-libgnutls = cc.find_library('gnutls', required : false)
+libgnutls = cc.find_library('gnutls', required : true)
 libudev = dependency('libudev', required : false)
 
 if libgnutls.found()
diff --git a/src/meson.build b/src/meson.build
index 296682758..f605a420c 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -2,7 +2,7 @@ if get_option('android')
     subdir('android')
 endif
 
-openssl = find_program('openssl', required : false)
+openssl = find_program('openssl', required : true)
 if openssl.found()
     ipa_gen_priv_key = find_program('ipa/gen-ipa-priv-key.sh')
     ipa_priv_key = custom_target('ipa-priv-key',