diff --git a/prism/ext/lp_solve_5.5_java/lib/build b/prism/ext/lp_solve_5.5_java/lib/build
index b9e36ee8..a44162d6 100755
--- a/prism/ext/lp_solve_5.5_java/lib/build
+++ b/prism/ext/lp_solve_5.5_java/lib/build
@@ -44,7 +44,7 @@ mkdir $PLATFORM >/dev/null 2>&1
 # OK, here we go!
 
 SRC_DIR=../src/c
-INCL="-I -I$JAVA_JNI_H_DIR -I$JAVA_JNI_MD_H_DIR -I $LPSOLVE_DIR -I $SRC_DIR"
+INCL="-I$JAVA_JNI_H_DIR -I$JAVA_JNI_MD_H_DIR -I $LPSOLVE_DIR -I $SRC_DIR"
 
 $c $CFLAGS $INCL -c $SRC_DIR/lpsolve5j.cpp
 $c $CFLAGS -shared -Wl,-soname,liblpsolve55j.so -o $PLATFORM/liblpsolve55j.so lpsolve5j.o -L$LPSOLVE_LIB_DIR -lc -llpsolve55
diff --git a/prism/ext/lp_solve_5.5_java/lib/mac/build-osx b/prism/ext/lp_solve_5.5_java/lib/mac/build-osx
index e47e87d4..acd6e220 100755
--- a/prism/ext/lp_solve_5.5_java/lib/mac/build-osx
+++ b/prism/ext/lp_solve_5.5_java/lib/mac/build-osx
@@ -19,7 +19,7 @@ LPSOLVE_LIB_DIR=../../../../lib
 # OK, here we go!
 
 SRC_DIR=../../src/c
-INCL="-I -I$JAVA_JNI_H_DIR -I$JAVA_JNI_MD_H_DIR -I $LPSOLVE_DIR -I $SRC_DIR -idirafter /usr/include/sys"
+INCL="-I$JAVA_JNI_H_DIR -I$JAVA_JNI_MD_H_DIR -I $LPSOLVE_DIR -I $SRC_DIR -idirafter /usr/include/sys"
 
 if [ "$ARCH" = "" ]
 then