diff --git a/decrypt.go b/decrypt.go
index 85a923c..7fdac2c 100644
--- a/decrypt.go
+++ b/decrypt.go
@@ -24,7 +24,7 @@ package ykpiv
 #cgo darwin LDFLAGS: -L /usr/local/lib -lykpiv
 #cgo darwin CFLAGS: -I/usr/local/include/ykpiv/
 #cgo linux LDFLAGS: -lykpiv
-#cgo linux CFLAGS: -I/usr/include/ykpiv/
+#cgo linux CFLAGS: -I/usr/local/include/ykpiv/ -I/usr/include/ykpiv/
 #include <ykpiv.h>
 #include <stdlib.h>
 */
diff --git a/errors.go b/errors.go
index 4bf8c25..9d61ac9 100644
--- a/errors.go
+++ b/errors.go
@@ -24,7 +24,7 @@ package ykpiv
 #cgo darwin LDFLAGS: -L /usr/local/lib -lykpiv
 #cgo darwin CFLAGS: -I/usr/local/include/ykpiv/
 #cgo linux LDFLAGS: -lykpiv
-#cgo linux CFLAGS: -I/usr/include/ykpiv/
+#cgo linux CFLAGS: -I/usr/local/include/ykpiv/ -I/usr/include/ykpiv/
 #include <ykpiv.h>
 */
 import "C"
diff --git a/generate.go b/generate.go
index 0ec92a3..6a1285f 100644
--- a/generate.go
+++ b/generate.go
@@ -24,7 +24,7 @@ package ykpiv
 #cgo darwin LDFLAGS: -L /usr/local/lib -lykpiv
 #cgo darwin CFLAGS: -I/usr/local/include/ykpiv/
 #cgo linux LDFLAGS: -lykpiv
-#cgo linux CFLAGS: -I/usr/include/ykpiv/
+#cgo linux CFLAGS: -I/usr/local/include/ykpiv/ -I/usr/include/ykpiv/
 #include <ykpiv.h>
 #include <stdlib.h>
 */
diff --git a/pivman.go b/pivman.go
index 34e63a6..ec59cd0 100644
--- a/pivman.go
+++ b/pivman.go
@@ -24,7 +24,7 @@ package ykpiv
 #cgo darwin LDFLAGS: -L /usr/local/lib -lykpiv
 #cgo darwin CFLAGS: -I/usr/local/include/ykpiv/
 #cgo linux LDFLAGS: -lykpiv
-#cgo linux CFLAGS: -I/usr/include/ykpiv/
+#cgo linux CFLAGS: -I/usr/local/include/ykpiv/ -I/usr/include/ykpiv/
 #include <ykpiv.h>
 #include <stdlib.h>
 */
diff --git a/sign.go b/sign.go
index b7c78f0..7acb857 100644
--- a/sign.go
+++ b/sign.go
@@ -24,7 +24,7 @@ package ykpiv
 #cgo darwin LDFLAGS: -L /usr/local/lib -lykpiv
 #cgo darwin CFLAGS: -I/usr/local/include/ykpiv/
 #cgo linux LDFLAGS: -lykpiv
-#cgo linux CFLAGS: -I/usr/include/ykpiv/
+#cgo linux CFLAGS: -I/usr/local/include/ykpiv/ -I/usr/include/ykpiv/
 #include <ykpiv.h>
 #include <stdlib.h>
 */
diff --git a/slot.go b/slot.go
index a81db3e..b66b07e 100644
--- a/slot.go
+++ b/slot.go
@@ -24,7 +24,7 @@ package ykpiv
 #cgo darwin LDFLAGS: -L /usr/local/lib -lykpiv
 #cgo darwin CFLAGS: -I/usr/local/include/ykpiv/
 #cgo linux LDFLAGS: -lykpiv
-#cgo linux CFLAGS: -I/usr/include/ykpiv/
+#cgo linux CFLAGS: -I/usr/local/include/ykpiv/ -I/usr/include/ykpiv/
 #include <ykpiv.h>
 #include <stdlib.h>
 */
diff --git a/ykpiv.go b/ykpiv.go
index cf24d56..724d15f 100644
--- a/ykpiv.go
+++ b/ykpiv.go
@@ -27,7 +27,7 @@ package ykpiv
 #cgo darwin LDFLAGS: -L /usr/local/lib -lykpiv
 #cgo darwin CFLAGS: -I/usr/local/include/ykpiv/
 #cgo linux LDFLAGS: -lykpiv -Wl,--allow-multiple-definition
-#cgo linux CFLAGS: -I/usr/include/ykpiv/
+#cgo linux CFLAGS: -I/usr/local/include/ykpiv/ -I/usr/include/ykpiv/
 #cgo windows CFLAGS: -I./win/include/ykpiv/
 #cgo windows LDFLAGS: ./win/lib/libykpiv.dll.a
 #include <ykpiv.h>