diff --git a/recipes/libest/all/conanfile.py b/recipes/libest/all/conanfile.py
index fd4949fd197313..f06587adb9a3ba 100644
--- a/recipes/libest/all/conanfile.py
+++ b/recipes/libest/all/conanfile.py
@@ -59,7 +59,10 @@ def source(self):
 
     def generate(self):
         tc = AutotoolsToolchain(self)
-        tc.configure_args.append(f"--with-ssl-dir={self.dependencies['openssl'].package_folder}")
+        openssl = self.dependencies["openssl"]
+        tc.configure_args.append(f"--with-ssl-dir={unix_path(self, openssl.package_folder)}")
+        tc.extra_cflags.append("-I" + unix_path(self, openssl.cpp_info.includedir))
+        tc.extra_ldflags.append("-L" + unix_path(self, openssl.cpp_info.libdir))
         tc.generate()
 
     def _patch_sources(self):