diff --git a/src/OpenFOAM/Make/options b/src/OpenFOAM/Make/options
index 88afbdbc12755fa638e91db53f2293778c4920a8..420d3469ec8582d2aa9c77229dddaa87a550b962 100644
--- a/src/OpenFOAM/Make/options
+++ b/src/OpenFOAM/Make/options
@@ -1,5 +1,5 @@
 EXE_INC = \
-    -I$(LIB_SRC)/zlib-1.2.1
+    -I$(LIB_SRC)/zlib-1.2.3
 
 LIB_LIBS = \
     $(FOAM_LIBBIN)/libOSspecific.o \