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-rw-r--r--lib/ppmdraw.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/ppmdraw.h b/lib/ppmdraw.h
index d7a02e79..df22b44d 100644
--- a/lib/ppmdraw.h
+++ b/lib/ppmdraw.h
@@ -8,6 +8,8 @@
 ** a single point, and it looks like this:
 */
 
+#include <netpbm/pm_config.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif