diff --git a/components/cpu.c b/components/cpu.c
index 10d25c0..d0d03c7 100644
--- a/components/cpu.c
+++ b/components/cpu.c
@@ -118,8 +118,7 @@
 
 		size = sizeof(freq);
 		/* in MHz */
-		if (sysctlbyname("hw.clockrate", &freq, &size, NULL, 0) == -1
-				|| !size) {
+		if (sysctlbyname("hw.clockrate", &freq, &size, NULL, 0) < 0 || !size) {
 			warn("sysctlbyname 'hw.clockrate':");
 			return NULL;
 		}
@@ -136,8 +135,7 @@
 
 		size = sizeof(a);
 		memcpy(b, a, sizeof(b));
-		if (sysctlbyname("kern.cp_time", &a, &size, NULL, 0) == -1
-				|| !size) {
+		if (sysctlbyname("kern.cp_time", &a, &size, NULL, 0) < 0 || !size) {
 			warn("sysctlbyname 'kern.cp_time':");
 			return NULL;
 		}
diff --git a/components/netspeeds.c b/components/netspeeds.c
index 97e565b..cde6fa9 100644
--- a/components/netspeeds.c
+++ b/components/netspeeds.c
@@ -71,7 +71,7 @@
 
 		oldrxbytes = rxbytes;
 
-		if (getifaddrs(&ifal) == -1) {
+		if (getifaddrs(&ifal) < 0) {
 			warn("getifaddrs failed");
 			return NULL;
 		}
@@ -105,7 +105,7 @@
 
 		oldtxbytes = txbytes;
 
-		if (getifaddrs(&ifal) == -1) {
+		if (getifaddrs(&ifal) < 0) {
 			warn("getifaddrs failed");
 			return NULL;
 		}
diff --git a/components/ram.c b/components/ram.c
index 326153f..15c4b74 100644
--- a/components/ram.c
+++ b/components/ram.c
@@ -159,8 +159,8 @@
 		size_t len;
 
 		len = sizeof(struct vmtotal);
-		if (sysctl(mib, 2, &vm_stats, &len, NULL, 0) == -1
-				|| !len)
+		if (sysctl(mib, 2, &vm_stats, &len, NULL, 0) < 0
+		    || !len)
 			return NULL;
 
 		return fmt_human(vm_stats.t_free * getpagesize(), 1024);
@@ -172,8 +172,8 @@
 		size_t len;
 
 		len = sizeof(npages);
-		if (sysctlbyname("vm.stats.vm.v_page_count", &npages, &len, NULL, 0) == -1
-				|| !len)
+		if (sysctlbyname("vm.stats.vm.v_page_count",
+		                 &npages, &len, NULL, 0) < 0 || !len)
 			return NULL;
 
 		return fmt_human(npages * getpagesize(), 1024);
@@ -186,12 +186,12 @@
 		size_t len;
 
 		len = sizeof(npages);
-		if (sysctlbyname("vm.stats.vm.v_page_count", &npages, &len, NULL, 0) == -1
-				|| !len)
+		if (sysctlbyname("vm.stats.vm.v_page_count",
+		                 &npages, &len, NULL, 0) < 0 || !len)
 			return NULL;
 
-		if (sysctlbyname("vm.stats.vm.v_active_count", &active, &len, NULL, 0) == -1
-				|| !len)
+		if (sysctlbyname("vm.stats.vm.v_active_count",
+		                 &active, &len, NULL, 0) < 0 || !len)
 			return NULL;
 
 		return bprintf("%d", active * 100 / npages);
@@ -203,8 +203,8 @@
 		size_t len;
 
 		len = sizeof(active);
-		if (sysctlbyname("vm.stats.vm.v_active_count", &active, &len, NULL, 0) == -1
-				|| !len)
+		if (sysctlbyname("vm.stats.vm.v_active_count",
+		                 &active, &len, NULL, 0) < 0 || !len)
 			return NULL;
 
 		return fmt_human(active * getpagesize(), 1024);
diff --git a/components/swap.c b/components/swap.c
index 6ae0542..f270d93 100644
--- a/components/swap.c
+++ b/components/swap.c
@@ -204,7 +204,7 @@
 			return 0;
 		}
 
-		if(kvm_getswapinfo(kd, swap_info, size, 0 /* Unused flags */) == -1) {
+		if (kvm_getswapinfo(kd, swap_info, size, 0 /* Unused flags */) < 0) {
 			warn("kvm_getswapinfo:");
 			kvm_close(kd);
 			return 0;