diff --git a/dtool/src/parser-inc/Sources.pp b/dtool/src/parser-inc/Sources.pp
index 9fce5bc820..5a1d04be26 100644
--- a/dtool/src/parser-inc/Sources.pp
+++ b/dtool/src/parser-inc/Sources.pp
@@ -1,7 +1,9 @@
 #define INSTALL_PARSER_INC \
     algorithm deque ft2build.h hash_map hash_set iostream list map memory \
     pair queue set stack stdcompare.h stdtypedefs.h \
-    string vector windows.h zlib.h md5.h files.h hex.h \
+    string vector windows.h zlib.h files.h hex.h \
+    bits/pthreadtypes.h \
+    openssl/md5.h openssl/evp.h openssl/rand.h openssl/ssl.h openssl/x509.h openssl/err.h \
     nurbs.hh stddef.h krb5.h MainHelix.h dllpath.h hxcom.h \
     hxcomm.h hxcore.h hxengin.h hxerror.h hxfiles.h hxtbuf.h \
     hxtbuff.h hxwin.h Python.h Cg/cg.h Cg/cgGL.h
diff --git a/dtool/src/parser-inc/err.h b/dtool/src/parser-inc/err.h
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/dtool/src/parser-inc/evp.h b/dtool/src/parser-inc/evp.h
new file mode 100644
index 0000000000..a9ef1fd091
--- /dev/null
+++ b/dtool/src/parser-inc/evp.h
@@ -0,0 +1,8 @@
+
+#ifndef EVP_H
+#define EVP_H
+
+struct EVP_CIPHER_CTX;
+struct EVP_PKEY;
+
+#endif
diff --git a/dtool/src/parser-inc/md5.h b/dtool/src/parser-inc/md5.h
index 25e0e9b698..be595bf362 100644
--- a/dtool/src/parser-inc/md5.h
+++ b/dtool/src/parser-inc/md5.h
@@ -20,13 +20,3 @@
 // intended to be compiled--they're just parsed by CPPParser (and
 // interrogate) in lieu of the actual system headers, to generate the
 // interrogate database.
-
-#ifndef MD5_H
-#define MD5_H
-
-namespace CryptoPP {
-  class MD5;
-};
-
-#endif
-
diff --git a/dtool/src/parser-inc/pthreadtypes.h b/dtool/src/parser-inc/pthreadtypes.h
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/dtool/src/parser-inc/rand.h b/dtool/src/parser-inc/rand.h
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/dtool/src/parser-inc/ssl.h b/dtool/src/parser-inc/ssl.h
new file mode 100644
index 0000000000..9e4fef7e1e
--- /dev/null
+++ b/dtool/src/parser-inc/ssl.h
@@ -0,0 +1,13 @@
+
+#ifndef SSL_H
+#define SSL_H
+
+struct BIO;
+struct SSL_CTX;
+struct EVP_CIPHER_CTX;
+struct EVP_PKEY;
+struct X509;
+struct X509_STORE;
+struct X509_NAME;
+
+#endif
diff --git a/dtool/src/parser-inc/x509.h b/dtool/src/parser-inc/x509.h
new file mode 100644
index 0000000000..bbd2598dfc
--- /dev/null
+++ b/dtool/src/parser-inc/x509.h
@@ -0,0 +1,10 @@
+
+#ifndef X509_H
+#define X509_H
+
+struct X509;
+struct X509_STORE;
+struct X509_NAME;
+
+#endif
+