poppler/SignatureInfo.cc | 1 +
 qt5/src/poppler-form.cc  | 1 +
 utils/pdfsig.cc          | 1 +
 3 files changed, 3 insertions(+)

diff --git a/poppler/SignatureInfo.cc b/poppler/SignatureInfo.cc
index 7ca8b969..254d42ec 100644
--- a/poppler/SignatureInfo.cc
+++ b/poppler/SignatureInfo.cc
@@ -19,6 +19,7 @@
 #include <string.h>
 
 #ifdef ENABLE_NSS3
+    #include <prtypes.h>
     #include <hasht.h>
 #else
     static const int HASH_AlgNULL = -1;
diff --git a/qt5/src/poppler-form.cc b/qt5/src/poppler-form.cc
index 7396b596..dfc2bde4 100644
--- a/qt5/src/poppler-form.cc
+++ b/qt5/src/poppler-form.cc
@@ -41,6 +41,7 @@
 #include <ctype.h>
 
 #ifdef ENABLE_NSS3
+  #include <prtypes.h>
   #include <hasht.h>
 #endif
 
diff --git a/utils/pdfsig.cc b/utils/pdfsig.cc
index c4e52fd8..cba6c1e6 100644
--- a/utils/pdfsig.cc
+++ b/utils/pdfsig.cc
@@ -21,6 +21,7 @@
 #include <stddef.h>
 #include <string.h>
 #include <time.h>
+#include <prtypes.h>
 #include <hasht.h>
 #include <fstream>
 #include "parseargs.h"