diff --git a/mozilla/config/autoconf.mk.in b/mozilla/config/autoconf.mk.in
index 09b79c6438f..73d1f33cdad 100644
--- a/mozilla/config/autoconf.mk.in
+++ b/mozilla/config/autoconf.mk.in
@@ -50,7 +50,7 @@ MOZ_NATIVE_ZLIB	= @SYSTEM_ZLIB@
 MOZ_NATIVE_JPEG	= @SYSTEM_JPEG@
 MOZ_NATIVE_PNG	= @SYSTEM_PNG@
 
-ACCFLAGS	= @CFLAGS@ @DEFS@
+ACCFLAGS	= @CFLAGS@ @DEFS@ $(NSPR_INCLUDES)
 ACLFLAGS	= @LDFLAGS@
 ACLIBS		= @LIBS@
 
@@ -70,6 +70,11 @@ MOC		= @MOC@
 OBJDIR_TAG	= _AC
 OBJDIR_NAME	= .
 
+NSPR_DIR	= @NSPR_DIR@
+NSPR_INCLUDES	= -I$(NSPR_DIR)/include
+NSPR_LDFLAGS	= -L$(NSPR_DIR)/lib
+NSPR_LIBS	= @NSPR_LIBS@
+
 FE_X_CFLAGS	= @FE_X_CFLAGS@
 FE_X_LIBS	= @FE_X_LIBS@
 FE_QT_CFLAGS	= @FE_QT_CFLAGS@