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-rw-r--r--converter/other/jbig/Makefile4
1 files changed, 3 insertions, 1 deletions
diff --git a/converter/other/jbig/Makefile b/converter/other/jbig/Makefile
index 30e634f1..ae16a728 100644
--- a/converter/other/jbig/Makefile
+++ b/converter/other/jbig/Makefile
@@ -11,7 +11,9 @@ LIBJBIG_OBJECTS = jbig.o jbig_tab.o
 
 EXTERN_INCLUDES =
 ifneq ($(JBIGHDR_DIR),NONE)
-  EXTERN_INCLUDES += -I$(JBIGHDR_DIR)
+  ifneq ($(JBIGHDR_DIR)x,x)
+    EXTERN_INCLUDES += -I$(JBIGHDR_DIR)
+  endif
 endif
 
 ifneq ($(JBIGHDR_DIR),NONE)