diff --git a/examples/sample.makefile.regen b/examples/sample.makefile.regen
index 04b5608..57a5350 100755
--- a/examples/sample.makefile.regen
+++ b/examples/sample.makefile.regen
@@ -28,7 +28,7 @@
 fi
 
 FIXEDPDU=`echo "[$ASN1PDU]" | sed -e "s/.*-pdu=auto.*//"`
-if test "$FIXEDPDU" ; then
+if test ! "$FIXEDPDU" ; then
 	EXTRA_CFLAGS="$EXTRA_CFLAGS -DASN_PDU_COLLECTION"
 fi
 
diff --git a/examples/sample.source.LDAP3/Makefile b/examples/sample.source.LDAP3/Makefile
index 5483981..6f3c8cd 100644
--- a/examples/sample.source.LDAP3/Makefile
+++ b/examples/sample.source.LDAP3/Makefile
@@ -163,7 +163,7 @@
 # This file may be used as an input for make(3)
 # Remove the lines below to convert it into a pure .am file
 TARGET = ldap3dump
-CFLAGS += -I. -DHAVE_CONFIG_H -DPDU=LDAPMessage
+CFLAGS += -I.  -DHAVE_CONFIG_H -DPDU=LDAPMessage
 OBJS=${ASN_MODULE_SOURCES:.c=.o} ${ASN_CONVERTER_SOURCES:.c=.o}
 
 all: LDAPMessage.c $(TARGET)
diff --git a/examples/sample.source.MEGACO/Makefile b/examples/sample.source.MEGACO/Makefile
index b1415a2..d8a930c 100644
--- a/examples/sample.source.MEGACO/Makefile
+++ b/examples/sample.source.MEGACO/Makefile
@@ -285,7 +285,7 @@
 # This file may be used as an input for make(3)
 # Remove the lines below to convert it into a pure .am file
 TARGET = megacoDump
-CFLAGS += -I. -DHAVE_CONFIG_H -DPDU=MegacoMessage
+CFLAGS += -I.  -DHAVE_CONFIG_H -DPDU=MegacoMessage
 OBJS=${ASN_MODULE_SOURCES:.c=.o} ${ASN_CONVERTER_SOURCES:.c=.o}
 
 all: MegacoMessage.c $(TARGET)
diff --git a/examples/sample.source.MHEG5/Makefile b/examples/sample.source.MHEG5/Makefile
index 011b028..b07656a 100644
--- a/examples/sample.source.MHEG5/Makefile
+++ b/examples/sample.source.MHEG5/Makefile
@@ -453,7 +453,7 @@
 # This file may be used as an input for make(3)
 # Remove the lines below to convert it into a pure .am file
 TARGET = mheg5dump
-CFLAGS += -I. -DHAVE_CONFIG_H -DPDU=InterchangedObject
+CFLAGS += -I.  -DHAVE_CONFIG_H -DPDU=InterchangedObject
 OBJS=${ASN_MODULE_SOURCES:.c=.o} ${ASN_CONVERTER_SOURCES:.c=.o}
 
 all: InterchangedObject.c $(TARGET)
diff --git a/examples/sample.source.PKIX1/Makefile b/examples/sample.source.PKIX1/Makefile
index 26ca748..8f902b2 100644
--- a/examples/sample.source.PKIX1/Makefile
+++ b/examples/sample.source.PKIX1/Makefile
@@ -345,7 +345,7 @@
 # This file may be used as an input for make(3)
 # Remove the lines below to convert it into a pure .am file
 TARGET = x509dump
-CFLAGS += -I. -DHAVE_CONFIG_H -DPDU=Certificate
+CFLAGS += -I.  -DHAVE_CONFIG_H -DPDU=Certificate
 OBJS=${ASN_MODULE_SOURCES:.c=.o} ${ASN_CONVERTER_SOURCES:.c=.o}
 
 all: Certificate.c $(TARGET)
diff --git a/examples/sample.source.TAP3/Makefile b/examples/sample.source.TAP3/Makefile
index 0d6dbcd..3dfb47f 100644
--- a/examples/sample.source.TAP3/Makefile
+++ b/examples/sample.source.TAP3/Makefile
@@ -679,7 +679,7 @@
 # This file may be used as an input for make(3)
 # Remove the lines below to convert it into a pure .am file
 TARGET = tap3dump
-CFLAGS += -I. -DHAVE_CONFIG_H -DPDU=DataInterChange
+CFLAGS += -I.  -DHAVE_CONFIG_H -DPDU=DataInterChange
 OBJS=${ASN_MODULE_SOURCES:.c=.o} ${ASN_CONVERTER_SOURCES:.c=.o}
 
 all: DataInterChange.c $(TARGET)